diff --git a/oms_web/oms_vue/src/api/inventory/delivery.js b/oms_web/oms_vue/src/api/inventory/delivery.js
index 0550cba4..c6339d2e 100644
--- a/oms_web/oms_vue/src/api/inventory/delivery.js
+++ b/oms_web/oms_vue/src/api/inventory/delivery.js
@@ -97,6 +97,15 @@ export function listProductSn(query) {
   })
 }
 
+// 查询仅维保订单发货可续用的SN（关联项目同产品编码的已发货SN）
+export function maintenanceSn(query) {
+  return request({
+    url: '/inventory/delivery/vue/maintenanceSn',
+    method: 'get',
+    params: query
+  })
+}
+
 export function removeDelivery(id) {
   return request({
     url: '/inventory/delivery/vue/' + id,
diff --git a/oms_web/oms_vue/src/api/project/order.js b/oms_web/oms_vue/src/api/project/order.js
index 039113ae..3f42f47d 100644
--- a/oms_web/oms_vue/src/api/project/order.js
+++ b/oms_web/oms_vue/src/api/project/order.js
@@ -86,6 +86,15 @@ export function updateFinanceStatus(id, status) {
   })
 }
 
+// 查询仅维保订单可关联的项目订单（仅正常订单且审批完成）
+export function relatedCandidateList(query) {
+  return request({
+    url: '/project/order/vue/relatedCandidateList',
+    method: 'get',
+    params: query
+  })
+}
+
 // 查询产品配货备货明细
 export function productMatchList(orderCode) {
   return request({
diff --git a/oms_web/oms_vue/src/views/inventory/outer/components/OuterForm.vue b/oms_web/oms_vue/src/views/inventory/outer/components/OuterForm.vue
index cb5f947a..6a5b5c28 100644
--- a/oms_web/oms_vue/src/views/inventory/outer/components/OuterForm.vue
+++ b/oms_web/oms_vue/src/views/inventory/outer/components/OuterForm.vue
@@ -89,6 +89,8 @@
 
     <!-- 发货弹窗 -->
     <generate-delivery-form ref="deliveryForm" @success="refreshTables"></generate-delivery-form>
+    <!-- 仅维保订单发货弹窗：直接续用关联项目已发货SN -->
+    <maintenance-delivery-form ref="maintenanceDeliveryForm" @success="refreshTables"></maintenance-delivery-form>
     <!-- 查看详情弹窗 -->
     <delivery-detail :delivery-id="deliveryId" :visible.sync="viewOpen" />
     <!-- 撤回审批查看弹窗 -->
@@ -130,12 +132,13 @@
 import { changeOuterStatus, getOuter, queryInfo } from '@/api/inventory/outer';
 import { removeDelivery, updateDeliveryStatus, recallDelivery, recallApply, checkRecallByDelivery } from '@/api/inventory/delivery';
 import GenerateDeliveryForm from './GenerateDeliveryForm.vue';
+import MaintenanceDeliveryForm from './MaintenanceDeliveryForm.vue';
 import DeliveryDetail from '@/views/inventory/delivery/Detail.vue';
 import OuterRebackDetail from '@/views/approve/all/components/OuterRebackDetail.vue';
 
 export default {
   name: "OuterForm",
-  components: { GenerateDeliveryForm, DeliveryDetail, OuterRebackDetail },
+  components: { GenerateDeliveryForm, MaintenanceDeliveryForm, DeliveryDetail, OuterRebackDetail },
   props: {
     viewOnly: {
       type: Boolean,
@@ -238,7 +241,12 @@ export default {
         ...this.form,
         notifierAddress: this.form.notifierAddress || row.notifierAddress || fallbackNotifierAddress || ''
       };
-      this.$refs.deliveryForm.open(row, formData);
+      // 仅维保订单：SN直接续用关联项目已发货SN，走专用发货弹窗
+      if (String(row.orderType || this.form.orderType) === '2') {
+        this.$refs.maintenanceDeliveryForm.open(row, formData);
+      } else {
+        this.$refs.deliveryForm.open(row, formData);
+      }
     },
     // 取消发货
     handleDeleteDelivery(deliveryId) {
diff --git a/oms_web/oms_vue/src/views/project/order/OrderDetail.vue b/oms_web/oms_vue/src/views/project/order/OrderDetail.vue
index 480dfd03..343a4673 100644
--- a/oms_web/oms_vue/src/views/project/order/OrderDetail.vue
+++ b/oms_web/oms_vue/src/views/project/order/OrderDetail.vue
@@ -13,12 +13,13 @@
                 @select-project="handleSelectProject"
                 @select-user="openSelectPeople"
                 @select-partner="openSelectPartner"
+                @select-related-order="openSelectRelatedOrder"
               />
             </div>
           </el-tab-pane>
           <el-tab-pane label="配置信息" name="config">
             <div style="max-height: 60vh; overflow-y: auto; padding: 15px;">
-              <product-config :value="form" @input="handleProductConfigInput" :disabled="!isProjectSelected || isOrderApprovedOrInReview" :lock-tax-rate="isProjectSelected" />
+              <product-config :value="form" @input="handleProductConfigInput" :disabled="productConfigDisabled" :lock-tax-rate="isProjectSelected" />
             </div>
           </el-tab-pane>
           <el-tab-pane label="流转过程" name="flow">
@@ -152,6 +153,7 @@
     <select-project :visible.sync="selectProjectVisible" @project-selected="selectProject"/>
     <select-user :visible.sync="selectUserVisible" @user-selected="handleUserSelected"/>
     <select-partner :visible.sync="selectPartnerVisible" @partner-selected="handlePartnerSelected"/>
+    <related-order-select-dialog :visible.sync="selectRelatedOrderVisible" :exclude-order-id="form.id" @select="handleRelatedOrderSelected"/>
     <select-commit-type :visible.sync="selectCommitTypeVisible" :order-channel="form.orderChannel" @commit-type-selected="handleCommitTypeSelected"/>
   </div>
 </template>
@@ -172,6 +174,7 @@ import OrderInfo from '@/views/project/order/components/OrderInfo.vue';
 import SelectProject from "@/views/project/info/SelectProject";
 import SelectUser from "@/views/system/user/selectUser";
 import SelectPartner from "@/views/system/partner/selectPartner";
+import RelatedOrderSelectDialog from "@/views/project/order/components/RelatedOrderSelectDialog.vue";
 import {isEmpty} from "@/utils/validate";
 
 export default {
@@ -183,6 +186,7 @@ export default {
     SelectProject,
     SelectUser,
     SelectPartner,
+    RelatedOrderSelectDialog,
   },
   props: {
     visible: {
@@ -223,6 +227,7 @@ export default {
       selectProjectVisible: false,
       selectUserVisible: false,
       selectPartnerVisible: false,
+      selectRelatedOrderVisible: false,
       selectCommitTypeVisible: false,
       submitLoading: false,
       // 当前激活的Tab
@@ -251,6 +256,13 @@ export default {
         notifierPhone: [{ required: true, message: "联系方式不能为空", trigger: "blur" }],
         paymentMethod: [{ required: true, message: "付款方式不能为空", trigger: "change" }],
         paymentRatio: [{ required: true, message: "付款比例不能为空", trigger: "blur" }],
+        relatedOrderId: [{ validator: (rule, value, callback) => {
+          if (this.form.orderType === '2' && !value) {
+            callback(new Error('仅维保订单必须选择关联项目'));
+          } else {
+            callback();
+          }
+        }, trigger: 'change' }],
       }
     };
   },
@@ -271,6 +283,17 @@ export default {
       const isRebackApproved = this.form.orderStatus === '2' && this.form.rebackApproveStatus === '2';
       return !isRebackApproved && (this.form.orderStatus === '1' || this.form.orderStatus === '2');
     },
+    // 产品配置可编辑条件：原有口径是「已选所属项目且订单未审批/未在批」；
+    // 仅维保订单带出关联订单的软件配置后，即使还没选自己的所属项目也要能直接改（配置最终归属本项目）
+    productConfigDisabled() {
+      if (this.isOrderApprovedOrInReview) {
+        return true;
+      }
+      if (this.form.orderType === '2' && this.form.relatedOrderId) {
+        return false;
+      }
+      return !this.isProjectSelected;
+    },
     uniqueVersions() {
       if (!this.approveLogList || this.approveLogList.length === 0) return [];
       const versions = [...new Set(this.approveLogList.map(log => log.extendField1))];
@@ -439,6 +462,7 @@ export default {
         dutyEmail: null, dutyPhone: null, partnerName: null, level: null, partnerUserName: null, partnerEmail: null,
         partnerPhone: null, notifierAddress: null, notifier: null, notifierEmail: null, notifierPhone: null,
         paymentMethod: null, paymentRatio: 0, paymentDescription: null, remark: null,
+        orderType: null, relatedOrderId: null, relatedOrderCode: null, relatedProjectName: null,
         softwareProjectProductInfoList: [], hardwareProjectProductInfoList: [], maintenanceProjectProductInfoList: []
       };
       this.orderBakFile = {};
@@ -523,7 +547,14 @@ export default {
       this.form.businessPerson = projectData.contactPerson;
       this.form.businessEmail = projectData.contactEmail;
       this.form.businessPhone = projectData.contactPhone;
-      this.form.softwareProjectProductInfoList = projectData.softwareProjectProductInfoList || [];
+      const incomingSoftware = projectData.softwareProjectProductInfoList || [];
+      // 仅维保订单已带出关联订单的软件配置时，随后选自己的项目不能把它清空（新项目本就还没有产品行）
+      const keepRelatedSoftware = !incomingSoftware.length
+        && this.form.orderType === '2' && !!this.form.relatedOrderId
+        && (this.form.softwareProjectProductInfoList || []).length > 0;
+      if (!keepRelatedSoftware) {
+        this.form.softwareProjectProductInfoList = incomingSoftware;
+      }
       this.form.hardwareProjectProductInfoList = projectData.hardwareProjectProductInfoList || [];
       this.form.maintenanceProjectProductInfoList = projectData.maintenanceProjectProductInfoList || [];
       this.form.industryType = projectData.industryType;
@@ -531,6 +562,53 @@ export default {
       this.selectProjectVisible = false;
       this.form.shipmentAmount = this.totalConfigAmount;
     },
+    openSelectRelatedOrder() {
+      this.selectRelatedOrderVisible = true;
+    },
+    // 选择关联项目：记录关联订单，并把关联订单的软件配置带入当前订单
+    // 复制出来的产品行必须清空 id/projectId，否则保存时会按关联项目的范围物理删除或更新产品行
+    handleRelatedOrderSelected(row) {
+      this.$set(this.form, 'relatedOrderId', row.id);
+      this.$set(this.form, 'relatedOrderCode', row.orderCode);
+      this.$set(this.form, 'relatedProjectName', row.projectName);
+      this.selectRelatedOrderVisible = false;
+      // 同一项目的产品配置本就共用，无需复制
+      if (row.projectId && this.form.projectId && row.projectId === this.form.projectId) {
+        this.$modal.msgSuccess('已关联项目：' + row.projectName);
+        this.validateRelatedOrderField();
+        return;
+      }
+      getOrder(row.id).then(response => {
+        const related = (response.data && response.data.projectOrderInfo) || {};
+        const softwareList = (related.softwareProjectProductInfoList || []).map(item => {
+          return Object.assign({}, item, { id: null, projectId: null });
+        });
+        if (softwareList.length === 0) {
+          this.$modal.msgWarning('关联项目未配置软件产品，请手动维护产品配置信息');
+          this.validateRelatedOrderField();
+          return;
+        }
+        const overwrite = () => {
+          this.form.softwareProjectProductInfoList = softwareList;
+          this.form.shipmentAmount = this.totalConfigAmount;
+          this.$modal.msgSuccess('已带出关联项目的软件配置');
+          this.validateRelatedOrderField();
+        };
+        if ((this.form.softwareProjectProductInfoList || []).length > 0) {
+          this.$modal.confirm('将使用关联项目的软件配置覆盖当前订单的软件产品，是否继续？').then(overwrite).catch(() => {});
+        } else {
+          overwrite();
+        }
+      });
+    },
+    // 关联项目为只读输入框，赋值后需手动触发校验
+    validateRelatedOrderField() {
+      this.$nextTick(() => {
+        if (this.$refs.form) {
+          this.$refs.form.validateField('relatedOrderId', () => {});
+        }
+      });
+    },
     openSelectPeople() {
       this.selectUserVisible = true;
     },
diff --git a/oms_web/oms_vue/src/views/project/order/components/OrderInfo.vue b/oms_web/oms_vue/src/views/project/order/components/OrderInfo.vue
index dd5f0b96..c80b0dcc 100644
--- a/oms_web/oms_vue/src/views/project/order/components/OrderInfo.vue
+++ b/oms_web/oms_vue/src/views/project/order/components/OrderInfo.vue
@@ -68,11 +68,30 @@
     </el-col>
     <el-col :span="8">
       <el-form-item label="订单类型" prop="orderType">
-        <el-select v-model="localOrderData.orderType"  :disabled="isReadonly">
+        <el-select v-model="localOrderData.orderType" :disabled="isReadonly" @change="handleOrderTypeChange">
           <el-option v-for="dict in dict.type.delivery_order_type" :key="dict.value" :label="dict.label" :value="dict.value"></el-option>
         </el-select>
       </el-form-item>
     </el-col>
+    <el-col :span="8" v-if="localOrderData.orderType === '2'">
+      <el-form-item label="关联项目" prop="relatedOrderId">
+        <el-input
+          :value="relatedOrderText"
+          placeholder="请选择关联项目"
+          readonly
+          :disabled="isReadonly"
+          @click.native="openRelatedOrderDialog"
+        >
+          <el-button slot="append" icon="el-icon-search" :disabled="isReadonly" @click.stop="openRelatedOrderDialog"></el-button>
+          <el-button
+            v-if="!isReadonly && localOrderData.relatedOrderId"
+            slot="append"
+            icon="el-icon-delete"
+            @click.stop="clearRelatedOrder"
+          ></el-button>
+        </el-input>
+      </el-form-item>
+    </el-col>
     <el-col :span="8">
       <el-form-item label="币种" prop="currencyType">
          <el-select v-model="localOrderData.currencyType" placeholder="请选择币种" :disabled="isReadonly">
@@ -290,6 +309,17 @@ export default {
     }
   },
   dicts:['delivery_order_type'],
+  computed: {
+    // 关联项目回显文本：关联订单编码 / 关联项目名称
+    relatedOrderText() {
+      const code = this.localOrderData.relatedOrderCode;
+      const name = this.localOrderData.relatedProjectName;
+      if (!code && !name) {
+        return '';
+      }
+      return [code, name].filter(item => !!item).join(' / ');
+    }
+  },
   data() {
     return {
       localOrderData: {},
@@ -331,6 +361,25 @@ export default {
   },
   methods: {
     getDicts,
+    // 切换订单类型：非仅维保时清空关联项目
+    handleOrderTypeChange(value) {
+      if (value !== '2') {
+        this.clearRelatedOrder();
+      }
+    },
+    // 打开关联项目选择弹窗，只读态不响应
+    openRelatedOrderDialog() {
+      if (this.isReadonly) {
+        return;
+      }
+      this.$emit('select-related-order');
+    },
+    // 清空关联项目：关联订单id/编码/项目名称一并清除，产品配置保持不动
+    clearRelatedOrder() {
+      this.$set(this.localOrderData, 'relatedOrderId', null);
+      this.$set(this.localOrderData, 'relatedOrderCode', null);
+      this.$set(this.localOrderData, 'relatedProjectName', null);
+    },
     handleBgChange(value, isInitialLoad = false) {
       if (!isInitialLoad) {
         this.localOrderData.industryType = null;
diff --git a/oms_web/oms_vue/src/views/project/order/components/OrderInfoDisplay.vue b/oms_web/oms_vue/src/views/project/order/components/OrderInfoDisplay.vue
index 961d7193..5968b541 100644
--- a/oms_web/oms_vue/src/views/project/order/components/OrderInfoDisplay.vue
+++ b/oms_web/oms_vue/src/views/project/order/components/OrderInfoDisplay.vue
@@ -106,6 +106,10 @@
           <td class="label-cell">付款比例</td>
           <td class="value-cell">{{ displayValue(localOrderData.paymentRatio, true) }}</td>
         </tr>
+        <tr v-if="localOrderData.orderType === '2'">
+          <td class="label-cell">关联项目</td>
+          <td class="value-cell" colspan="5">{{ displayValue(relatedText) }}</td>
+        </tr>
         <tr>
           <td class="label-cell">付款条件</td>
           <td class="value-cell" colspan="5" style="white-space: pre-wrap;">{{ displayValue(localOrderData.paymentDescription) }}</td>
@@ -180,6 +184,16 @@ export default {
       paymentMethodOptions: [],
     };
   },
+  computed: {
+    // 仅维保订单展示的关联项目：订单编号 / 项目名称
+    relatedText() {
+      if (!this.localOrderData.relatedOrderCode) { return ''; }
+      if (this.localOrderData.relatedProjectName) {
+        return this.localOrderData.relatedOrderCode + ' / ' + this.localOrderData.relatedProjectName;
+      }
+      return this.localOrderData.relatedOrderCode;
+    },
+  },
   watch: {
     orderData: {
       handler(newValue) {
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/controller/vue/VueDeliveryController.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/controller/vue/VueDeliveryController.java
index 0da88326..e0d99696 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/controller/vue/VueDeliveryController.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/controller/vue/VueDeliveryController.java
@@ -75,6 +75,15 @@ public class VueDeliveryController extends BaseController {
         return AjaxResult.success(inventoryDelivery);
     }
 
+    /**
+     * 查询仅维保订单发货可续用的SN（关联项目下同产品编码的已发货SN）
+     */
+    @RequiresPermissions("inventory:delivery:add")
+    @GetMapping("/maintenanceSn")
+    public AjaxResult maintenanceSn(@RequestParam String orderCode, @RequestParam String productCode) {
+        return AjaxResult.success(inventoryDeliveryService.getMaintenanceSnList(orderCode, productCode));
+    }
+
     /**
      * 新增发货记录
      */
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/controller/vue/VueProjectOrderInfoController.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/controller/vue/VueProjectOrderInfoController.java
index 39283441..8aa5ead3 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/controller/vue/VueProjectOrderInfoController.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/controller/vue/VueProjectOrderInfoController.java
@@ -169,6 +169,19 @@ public class VueProjectOrderInfoController extends BaseController {
         return AjaxResult.success(fileName);
     }
 
+    /**
+     * 仅维保订单「关联项目」候选订单：只返回已审批完成的正常订单，可排除自身
+     */
+    @RequiresPermissions("project:order:list")
+    @GetMapping("/relatedCandidateList")
+    public TableDataInfo relatedCandidateList(@RequestParam(required = false) String projectCode,
+                                              @RequestParam(required = false) String projectName,
+                                              @RequestParam(required = false) Long excludeOrderId) {
+        startPage();
+        List<ProjectOrderInfo> list = projectOrderInfoService.selectRelatedCandidateList(projectCode, projectName, excludeOrderId);
+        return getDataTable(list);
+    }
+
     /**
      * 配备货产品信息
      */
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/domain/ProjectOrderInfo.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/domain/ProjectOrderInfo.java
index e2b18254..a9e52bc1 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/domain/ProjectOrderInfo.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/domain/ProjectOrderInfo.java
@@ -73,6 +73,21 @@ public class ProjectOrderInfo extends BaseEntity {
     private String customerUserName;
     private String orderType;
 
+    /**
+     * 关联项目订单id：仅维保订单（orderType=2）必填，指向被关联的正常订单
+     */
+    private Long relatedOrderId;
+
+    /**
+     * 关联项目订单编码（只读，联表带出）
+     */
+    private String relatedOrderCode;
+
+    /**
+     * 关联项目名称（只读，联表带出）
+     */
+    private String relatedProjectName;
+
     /**
      * 出货金额
      */
@@ -317,6 +332,25 @@ public class ProjectOrderInfo extends BaseEntity {
      */
     private Integer operationVersion;
 
+    /**
+     * 订单类型 1:正常订单 2:仅维保
+     */
+    @Getter
+    public enum OrderTypeEnum {
+        NORMAL("1", "正常订单"),
+        MAINTENANCE("2", "仅维保"),
+
+        ;
+
+        private final String value;
+        private final String code;
+
+        OrderTypeEnum(String code, String value) {
+            this.code = code;
+            this.value = value;
+        }
+
+    }
     @Getter
     public enum OrderStatus {
         WAIT_COMMIT("0", "待提交"),
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/InventoryDeliveryMapper.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/InventoryDeliveryMapper.java
index a3563f5b..12309f25 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/InventoryDeliveryMapper.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/InventoryDeliveryMapper.java
@@ -7,6 +7,7 @@ import com.ruoyi.sip.domain.InventoryDelivery;
 import com.ruoyi.sip.dto.ApiDataQueryDto;
 import com.ruoyi.sip.vo.DeliveryApproveVo;
 import com.ruoyi.sip.vo.DeliveryInfoVo;
+import com.ruoyi.sip.vo.MaintenanceSnVo;
 import org.apache.ibatis.annotations.Param;
 import org.apache.ibatis.annotations.Select;
 
@@ -71,6 +72,15 @@ public interface InventoryDeliveryMapper
 
     List<DeliveryInfoVo> listSn(ApiDataQueryDto dto);
 
+    /**
+     * 查询指定订单指定产品编码下已发货的SN（仅维保订单续用）
+     *
+     * @param orderCode   关联订单编码
+     * @param productCode 产品编码
+     * @return 已发货SN列表
+     */
+    List<MaintenanceSnVo> listMaintenanceSn(@Param("orderCode") String orderCode, @Param("productCode") String productCode);
+
     List<DeliveryApproveVo> selectDeliveryApproveList(@Param("id") Long id);
 
     /**
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/ProjectOrderInfoMapper.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/ProjectOrderInfoMapper.java
index 020e1bdb..2f652b97 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/ProjectOrderInfoMapper.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/ProjectOrderInfoMapper.java
@@ -2,6 +2,7 @@ package com.ruoyi.sip.mapper;
 
 import java.math.BigDecimal;
 import java.util.List;
+import java.util.Map;
 
 import com.ruoyi.sip.domain.InventoryDelivery;
 import com.ruoyi.sip.domain.ProjectOrderInfo;
@@ -38,6 +39,14 @@ public interface ProjectOrderInfoMapper
      * @return 订单管理集合
      */
     public List<ProjectOrderInfo> selectProjectOrderInfoList(ProjectOrderInfo projectOrderInfo);
+
+    /**
+     * 仅维保订单「关联项目」候选订单：已审批完成的正常订单
+     *
+     * @param params projectCode 项目编码 / projectName 项目名称 / excludeOrderId 需排除的订单id
+     * @return 候选订单集合
+     */
+    public List<ProjectOrderInfo> selectRelatedCandidateList(Map<String, Object> params);
     public ProjectOrderInfo selectProjectOrderInfoByCode(String orderCode);
 
     /**
@@ -64,6 +73,14 @@ public interface ProjectOrderInfoMapper
      */
     public int clearRebackApproveStatus(Long id);
 
+    /**
+     * 清空订单的关联项目（仅维保订单改回正常订单时使用）
+     *
+     * @param id 订单管理主键
+     * @return 结果
+     */
+    public int clearRelatedOrderId(Long id);
+
     /**
      * 删除订单管理
      * 
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/IInventoryDeliveryService.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/IInventoryDeliveryService.java
index 5ba630ce..426bb8d6 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/IInventoryDeliveryService.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/IInventoryDeliveryService.java
@@ -6,6 +6,7 @@ import com.ruoyi.sip.domain.InventoryDelivery;
 import com.ruoyi.sip.dto.ApiDataQueryDto;
 import com.ruoyi.sip.dto.inventory.InventoryDeliveryDetailExcelDto;
 import com.ruoyi.sip.vo.DeliveryInfoVo;
+import com.ruoyi.sip.vo.MaintenanceDeliveryVo;
 
 /**
  * 产品库存Service接口
@@ -110,4 +111,13 @@ public interface IInventoryDeliveryService
 
     void generateServiceBillsWhenAllDelivered(String orderCode);
 
+    /**
+     * 查询仅维保订单发货可续用的SN（关联项目下同产品编码的已发货SN）
+     *
+     * @param orderCode   仅维保订单编码
+     * @param productCode 产品编码
+     * @return 关联项目信息与可续用的SN列表
+     */
+    MaintenanceDeliveryVo getMaintenanceSnList(String orderCode, String productCode);
+
 }
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/IProjectOrderInfoService.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/IProjectOrderInfoService.java
index 833abddc..1435c494 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/IProjectOrderInfoService.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/IProjectOrderInfoService.java
@@ -54,6 +54,16 @@ public interface IProjectOrderInfoService
      * @return 结果
      */
     public int updateProjectOrderInfo(ProjectOrderInfo projectOrderInfo);
+
+    /**
+     * 仅维保订单「关联项目」候选订单列表（已审批完成的正常订单）
+     *
+     * @param projectCode    项目编码，模糊匹配，可为空
+     * @param projectName    项目名称，模糊匹配，可为空
+     * @param excludeOrderId 需要排除的订单id（编辑时排除自身），可为空
+     * @return 候选订单集合
+     */
+    List<ProjectOrderInfo> selectRelatedCandidateList(String projectCode, String projectName, Long excludeOrderId);
     public int updateProjectOrderInfoByCode(ProjectOrderInfo projectOrderInfo);
 
     /**
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/InventoryDeliveryServiceImpl.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/InventoryDeliveryServiceImpl.java
index 81468970..ac064321 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/InventoryDeliveryServiceImpl.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/InventoryDeliveryServiceImpl.java
@@ -27,6 +27,8 @@ import com.ruoyi.sip.mapper.OmsPurchaseOrderMapMapper;
 import com.ruoyi.sip.service.*;
 import com.ruoyi.sip.vo.DeliveryApproveVo;
 import com.ruoyi.sip.vo.DeliveryInfoVo;
+import com.ruoyi.sip.vo.MaintenanceDeliveryVo;
+import com.ruoyi.sip.vo.MaintenanceSnVo;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.collections.CollectionUtils;
 import org.flowable.engine.RuntimeService;
@@ -145,6 +147,8 @@ public class InventoryDeliveryServiceImpl implements IInventoryDeliveryService,
             throw new ServiceException("发货清单为空,保存失败");
         }
 
+        //仅维保订单：发货SN直接沿用关联项目已发货的SN，不校验采购绑定、不回写SN库存信息
+        boolean maintenanceOnly = false;
         if (StringUtils.isNotEmpty(inventoryDelivery.getOrderCode())) {
             ProjectOrderInfo orderInfo = projectOrderInfoService.selectProjectOrderInfoByOrderCode(inventoryDelivery.getOrderCode());
             if (orderInfo == null) {
@@ -152,8 +156,11 @@ public class InventoryDeliveryServiceImpl implements IInventoryDeliveryService,
             }
             //版本号取订单的version_code
             inventoryDelivery.setVersionCode(orderInfo.getVersionCode());
+            maintenanceOnly = ProjectOrderInfo.OrderTypeEnum.MAINTENANCE.getCode().equals(orderInfo.getOrderType());
 
-            if (StringUtils.isNotEmpty(inventoryDelivery.getPurchaseNo())) {
+            if (maintenanceOnly) {
+                validateMaintenanceDeliverySn(inventoryDelivery.getOrderCode(), inventoryDelivery.getProductCode(), productSnList);
+            } else if (StringUtils.isNotEmpty(inventoryDelivery.getPurchaseNo())) {
                 int newSnCount = CollUtil.isEmpty(productSnList) ? productSnDataList.size() : productSnList.size();
                 OmsPurchaseOrder purchaseOrder = omsPurchaseOrderService.selectOmsPurchaseOrderByNo(inventoryDelivery.getPurchaseNo());
                 if (purchaseOrder == null) {
@@ -276,7 +283,10 @@ public class InventoryDeliveryServiceImpl implements IInventoryDeliveryService,
 
                 return info;
             }).collect(Collectors.toList());
-            inventoryInfoService.saveBatch(inventoryInfoList);
+            //仅维保发货只写发货单与发货明细，SN的库存状态、出库单号、订单归属保持关联项目原值
+            if (!maintenanceOnly) {
+                inventoryInfoService.saveBatch(inventoryInfoList);
+            }
         } else {
             Long warehouseId = productSnDataList.get(0).getWarehouseId();
             if (warehouseId!=null && !warehouseId.equals(inventoryDelivery.getWarehouseId())){
@@ -615,9 +625,19 @@ public class InventoryDeliveryServiceImpl implements IInventoryDeliveryService,
         List<ProductInfo> productInfos = productInfoService.selectProductInfoList(productInfo);
         productInfo.setType(ProductInfo.ProductTypeEnum.SERVICE.getType());
         productInfos.addAll(productInfoService.selectProductInfoList(productInfo));
-        // 设置服务等级和服务结束时间
-        for (DeliveryInfoVo deliveryInfoVo : resultList) {
-            updateDeliveryInfoVo(deliveryInfoVo, maintenanceTypeMap, productInfos);
+        // 设置服务等级和服务结束时间：同一SN+同一产品编码按订单排序（审批时间→创建时间→订单id升序），
+        // 后一单（仅维保）的维保起始日取前一单最后一段维保截止日，实现维保日期续算
+        Map<String, List<DeliveryInfoVo>> snGroupMap = resultList.stream().collect(Collectors.groupingBy(
+                item -> item.getSerialNumber() + "#" + item.getProductCode(), LinkedHashMap::new, Collectors.toList()));
+        for (List<DeliveryInfoVo> sameSnList : snGroupMap.values()) {
+            sameSnList.sort(maintenanceSnComparator());
+            Date carryStartTime = null;
+            for (DeliveryInfoVo deliveryInfoVo : sameSnList) {
+                Date lastServiceEndTime = updateDeliveryInfoVo(deliveryInfoVo, maintenanceTypeMap, productInfos, carryStartTime);
+                if (lastServiceEndTime != null) {
+                    carryStartTime = lastServiceEndTime;
+                }
+            }
         }
         return resultList;
     }
@@ -1473,10 +1493,16 @@ public class InventoryDeliveryServiceImpl implements IInventoryDeliveryService,
     /**
      * 更新 DeliveryInfoVo 的服务等级和服务结束时间
      */
-    private void updateDeliveryInfoVo(DeliveryInfoVo deliveryInfoVo, Map<Long, List<ProjectProductInfo>> maintenanceTypeMap, List<ProductInfo> productInfos) {
+    /**
+     * 计算发货明细的维保等级与维保起止时间
+     *
+     * @param carryStartTime 续算起始日（同一SN上一单最后一段维保截止日），为空时按发货日期起算
+     * @return 本单最后一段维保截止日，无维保段时返回 null，供下一单续算
+     */
+    private Date updateDeliveryInfoVo(DeliveryInfoVo deliveryInfoVo, Map<Long, List<ProjectProductInfo>> maintenanceTypeMap, List<ProductInfo> productInfos, Date carryStartTime) {
         List<ProjectProductInfo> productInfoList = maintenanceTypeMap.get(deliveryInfoVo.getProjectId());
         List<DeliveryInfoVo.ServiceInfo> serviceInfoList = new ArrayList<>();
-        Date startTime = deliveryInfoVo.getServiceStartTime();
+        Date startTime = carryStartTime != null ? carryStartTime : deliveryInfoVo.getServiceStartTime();
         if (CollUtil.isNotEmpty(productInfoList) && ProductInfo.ProductTypeEnum.SOFTWARE.getType().equals(deliveryInfoVo.getProductType())) {
             for (ProjectProductInfo productInfo : productInfoList) {
                 if (ProductInfo.ProductTypeLevel2ServiceEnum.SOFTWARE_QA.getType().equals(productInfo.getLevel2Type()) && StringUtils.isNotEmpty(productInfo.getValue())) {
@@ -1511,6 +1537,10 @@ public class InventoryDeliveryServiceImpl implements IInventoryDeliveryService,
             }
         }
         deliveryInfoVo.setServiceInfo(serviceInfoList);
+        if (CollUtil.isEmpty(serviceInfoList)) {
+            return null;
+        }
+        return serviceInfoList.get(serviceInfoList.size() - 1).getServiceEndTime();
     }
 
     private Date updateStartTimeAndAddList(DeliveryInfoVo deliveryInfoVo, ProjectProductInfo productInfo, Date startTime, List<DeliveryInfoVo.ServiceInfo> serviceInfoList) {
@@ -1525,4 +1555,57 @@ public class InventoryDeliveryServiceImpl implements IInventoryDeliveryService,
         serviceInfoList.add(serviceInfo);
         return startTime;
     }
+
+    /**
+     * 同一SN+产品编码的续算排序：审批时间（为空回退创建时间）升序，完全相同按订单id升序
+     */
+    private Comparator<DeliveryInfoVo> maintenanceSnComparator() {
+        Comparator<Date> dateComparator = Comparator.nullsLast(Comparator.naturalOrder());
+        return Comparator.comparing((DeliveryInfoVo vo) -> vo.getApproveTime() != null ? vo.getApproveTime() : vo.getCreateTime(), dateComparator)
+                .thenComparing(DeliveryInfoVo::getOrderId, Comparator.nullsLast(Comparator.naturalOrder()));
+    }
+
+    /**
+     * 查询仅维保订单发货可续用的SN（关联项目下同产品编码的已发货SN）
+     */
+    @Override
+    public MaintenanceDeliveryVo getMaintenanceSnList(String orderCode, String productCode) {
+        if (StringUtils.isEmpty(orderCode) || StringUtils.isEmpty(productCode)) {
+            throw new ServiceException("订单编码和产品编码不能为空");
+        }
+        ProjectOrderInfo orderInfo = projectOrderInfoService.selectProjectOrderInfoByOrderCode(orderCode);
+        if (orderInfo == null) {
+            throw new ServiceException("订单信息不存在");
+        }
+        if (!ProjectOrderInfo.OrderTypeEnum.MAINTENANCE.getCode().equals(orderInfo.getOrderType())) {
+            throw new ServiceException("当前订单不是仅维保订单，无需续用关联项目SN");
+        }
+        if (orderInfo.getRelatedOrderId() == null) {
+            throw new ServiceException("当前仅维保订单未配置关联项目，无法发货");
+        }
+        ProjectOrderInfo relatedOrder = projectOrderInfoService.selectProjectOrderInfoById(orderInfo.getRelatedOrderId());
+        if (relatedOrder == null) {
+            throw new ServiceException("关联项目订单不存在");
+        }
+        List<MaintenanceSnVo> snList = inventoryDeliveryMapper.listMaintenanceSn(relatedOrder.getOrderCode(), productCode);
+        MaintenanceDeliveryVo vo = new MaintenanceDeliveryVo();
+        vo.setRelatedOrderId(relatedOrder.getId());
+        vo.setRelatedOrderCode(relatedOrder.getOrderCode());
+        vo.setRelatedProjectName(relatedOrder.getProjectName());
+        vo.setSnList(snList == null ? new ArrayList<>() : snList);
+        vo.setAvailableNum(CollUtil.isEmpty(snList) ? 0 : snList.size());
+        return vo;
+    }
+
+    /**
+     * 校验仅维保订单发货的SN必须来自关联项目同产品编码的已发货SN
+     */
+    private void validateMaintenanceDeliverySn(String orderCode, String productCode, List<String> productSnList) {
+        MaintenanceDeliveryVo maintenanceVo = getMaintenanceSnList(orderCode, productCode);
+        List<String> availableSnList = maintenanceVo.getSnList().stream()
+                .map(MaintenanceSnVo::getProductSn).collect(Collectors.toList());
+        if (CollUtil.isEmpty(productSnList) || !availableSnList.containsAll(productSnList)) {
+            throw new ServiceException("仅维保订单只能发关联项目已发货的SN，请重新选择发货清单");
+        }
+    }
 }
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/ProjectOrderInfoServiceImpl.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/ProjectOrderInfoServiceImpl.java
index b2fed239..82c15b85 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/ProjectOrderInfoServiceImpl.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/ProjectOrderInfoServiceImpl.java
@@ -329,6 +329,7 @@ public class ProjectOrderInfoServiceImpl implements IProjectOrderInfoService, To
         if (projectOrderInfo.getProjectId() == null) {
             throw new ServiceException("请选择项目");
         }
+        validateRelatedOrder(projectOrderInfo, projectOrderInfo.getOrderType());
         List<ProjectOrderInfo> projectOrderInfos = this.selectProjectOrderInfoByProjectId(Collections.singletonList(projectOrderInfo.getProjectId()));
         if (CollUtil.isNotEmpty(projectOrderInfos)) {
             throw new ServiceException("该项目存在订单流转，无法添加");
@@ -448,6 +449,15 @@ public class ProjectOrderInfoServiceImpl implements IProjectOrderInfoService, To
         }
         projectInfoMapper.updateProjectInfo(projectInfo);
 
+        // 前端未回传订单类型时以库中已有类型为准，避免仅维保校验被绕过
+        String effectiveOrderType = StringUtils.isNotEmpty(projectOrderInfo.getOrderType())
+                ? projectOrderInfo.getOrderType() : existProjectOrderInfo.getOrderType();
+        validateRelatedOrder(projectOrderInfo, effectiveOrderType);
+        if (!ProjectOrderInfo.OrderTypeEnum.MAINTENANCE.getCode().equals(effectiveOrderType)
+                && existProjectOrderInfo.getRelatedOrderId() != null) {
+            //订单类型由仅维保改回正常：动态update不会写入null，需显式清空历史关联
+            projectOrderInfoMapper.clearRelatedOrderId(projectOrderInfo.getId());
+        }
         //不更新订单编号
         projectOrderInfo.setOrderCode(null);
         projectOrderInfo.setUpdateBy(ShiroUtils.getUserId().toString());
@@ -529,6 +539,46 @@ public class ProjectOrderInfoServiceImpl implements IProjectOrderInfoService, To
         return projectOrderInfoMapper.updateProjectOrderInfoByCode(projectOrderInfo);
     }
 
+    @Override
+    public List<ProjectOrderInfo> selectRelatedCandidateList(String projectCode, String projectName, Long excludeOrderId) {
+        Map<String, Object> params = new HashMap<>();
+        params.put("projectCode", projectCode);
+        params.put("projectName", projectName);
+        params.put("excludeOrderId", excludeOrderId);
+        return projectOrderInfoMapper.selectRelatedCandidateList(params);
+    }
+
+    /**
+     * 校验「关联项目」：仅维保订单必须关联一个已审批完成的正常订单，且不能是订单自身；
+     * 非仅维保订单不保留关联项目。
+     *
+     * @param projectOrderInfo 待保存订单
+     * @param orderType        生效的订单类型（编辑时前端可能不回传）
+     */
+    private void validateRelatedOrder(ProjectOrderInfo projectOrderInfo, String orderType) {
+        if (!ProjectOrderInfo.OrderTypeEnum.MAINTENANCE.getCode().equals(orderType)) {
+            projectOrderInfo.setRelatedOrderId(null);
+            return;
+        }
+        Long relatedOrderId = projectOrderInfo.getRelatedOrderId();
+        if (relatedOrderId == null) {
+            throw new ServiceException("仅维保订单必须选择关联项目");
+        }
+        if (relatedOrderId.equals(projectOrderInfo.getId())) {
+            throw new ServiceException("关联项目不能选择当前订单本身");
+        }
+        ProjectOrderInfo related = projectOrderInfoMapper.selectProjectOrderInfoById(relatedOrderId);
+        if (related == null) {
+            throw new ServiceException("关联项目订单不存在");
+        }
+        if (!ProjectOrderInfo.OrderTypeEnum.NORMAL.getCode().equals(related.getOrderType())) {
+            throw new ServiceException("仅维保订单只能关联正常订单");
+        }
+        if (!ProjectOrderInfo.OrderStatus.APPROVE_COMPLETE.getCode().equals(related.getOrderStatus())) {
+            throw new ServiceException("关联项目订单不处于审批完成状态，无法关联");
+        }
+    }
+
     private String getFlowBusinessKey(String code, String processType) {
         if (StringUtils.isEmpty(code)) {
             throw new ServiceException("流程BusinessKey为空");
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/vo/DeliveryInfoVo.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/vo/DeliveryInfoVo.java
index 22e41ffb..5d0dab03 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/vo/DeliveryInfoVo.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/vo/DeliveryInfoVo.java
@@ -38,6 +38,17 @@ public class DeliveryInfoVo {
     private Date serviceStartTime;
     private List<ServiceInfo> serviceInfo;
 
+    /**
+     * 订单审批完成时间：仅维保续算时用于订单排序，审批时间为空回退 createTime
+     */
+    @JsonIgnore
+    private Date approveTime;
+    /**
+     * 订单创建时间
+     */
+    @JsonIgnore
+    private Date createTime;
+
     private Date lastUpdateTime;
     @JsonIgnore
     private Long projectId;
diff --git a/ruoyi-sip/src/main/resources/mapper/inventory/InventoryDeliveryMapper.xml b/ruoyi-sip/src/main/resources/mapper/inventory/InventoryDeliveryMapper.xml
index f280f007..d0f3d0c6 100644
--- a/ruoyi-sip/src/main/resources/mapper/inventory/InventoryDeliveryMapper.xml
+++ b/ruoyi-sip/src/main/resources/mapper/inventory/InventoryDeliveryMapper.xml
@@ -85,51 +85,101 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
       where t3.order_code=  #{orderCode} and t1.delivery_status = #{status}
     </select>
     <select id="listSn" resultType="com.ruoyi.sip.vo.DeliveryInfoVo">
-        SELECT
-            t3.order_code,
-            CAST(ifnull(t5.version_code,0) + ifnull(t5.operation_version,0) AS SIGNED) AS version_code,
-            t5.version_code as order_version_code,
-            t5.project_id ,
-            t2.product_sn as 'serialNumber' ,
-            t2.product_code,
-            t4.description as 'productDescription',
-            t4.type as 'productType',
-            t1.delivery_time as service_start_time,
-            t1.update_time as 'lastUpdateTime'
-        FROM
-        oms_inventory_delivery t1
-        inner JOIN oms_inventory_info t2 ON t1.outer_code = t2.outer_code
-        inner join oms_inventory_outer t3 on t1.outer_code=t3.outer_code
-        inner join product_info t4 on t2.product_code=t4.product_code
-        inner join project_order_info t5 on t3.order_code=t5.order_code
-        WHERE
-        t1.delivery_status = 1
+        SELECT * FROM (
+            SELECT
+                t3.order_code,
+                CAST(ifnull(t5.version_code,0) + ifnull(t5.operation_version,0) AS SIGNED) AS version_code,
+                t5.version_code as order_version_code,
+                t5.project_id ,
+                t5.id as order_id,
+                t5.approve_time,
+                t5.create_time,
+                d.product_sn as 'serialNumber' ,
+                t3.product_code,
+                t4.description as 'productDescription',
+                t4.type as 'productType',
+                t1.delivery_time as service_start_time,
+                t1.update_time as 'lastUpdateTime'
+            FROM
+            oms_inventory_delivery t1
+            inner join oms_inventory_delivery_detail d on d.delivery_id = t1.id
+            inner join oms_inventory_outer t3 on t1.outer_code=t3.outer_code
+            inner join product_info t4 on t3.product_code=t4.product_code
+            inner join project_order_info t5 on t3.order_code=t5.order_code
+            WHERE t1.delivery_status = 1
+            union all
+            SELECT
+                t3.order_code,
+                CAST(ifnull(t5.version_code,0) + ifnull(t5.operation_version,0) AS SIGNED) AS version_code,
+                t5.version_code as order_version_code,
+                t5.project_id ,
+                t5.id as order_id,
+                t5.approve_time,
+                t5.create_time,
+                t2.product_sn as 'serialNumber' ,
+                t2.product_code,
+                t4.description as 'productDescription',
+                t4.type as 'productType',
+                t1.delivery_time as service_start_time,
+                t1.update_time as 'lastUpdateTime'
+            FROM
+            oms_inventory_delivery t1
+            inner JOIN oms_inventory_info t2 ON t1.outer_code = t2.outer_code
+            inner join oms_inventory_outer t3 on t1.outer_code=t3.outer_code
+            inner join product_info t4 on t2.product_code=t4.product_code
+            inner join project_order_info t5 on t3.order_code=t5.order_code
+            WHERE t1.delivery_status = 1
+            and not exists (select 1 from oms_inventory_delivery_detail dd where dd.delivery_id = t1.id)
+        ) sn
+        WHERE 1 = 1
         <choose>
             <when test="queryStartTime!=null and queryEndTime!=null">
-                and t1.update_time between #{queryStartTime} and #{queryEndTime}
+                and sn.lastUpdateTime between #{queryStartTime} and #{queryEndTime}
             </when>
             <when test="queryStartTime!=null">
-                and t1.update_time   <![CDATA[ >= ]]>  #{queryStartTime}
+                and sn.lastUpdateTime   <![CDATA[ >= ]]>  #{queryStartTime}
             </when>
             <when test="queryEndTime!=null">
-                and t1.update_time   <![CDATA[ <= ]]>  #{queryEndTime}
+                and sn.lastUpdateTime   <![CDATA[ <= ]]>  #{queryEndTime}
             </when>
         </choose>
         <choose>
             <when test="serialNumbers != null and serialNumbers.size > 0">
-                and t2.product_sn in
+                and sn.serialNumber in
                 <foreach item="item" collection="serialNumbers" open="(" separator="," close=")">
                     #{item}
                 </foreach>
             </when>
             <when test="serialNumber!=null and serialNumber!=''">
-                and t2.product_sn = #{serialNumber}
+                and sn.serialNumber = #{serialNumber}
             </when>
         </choose>
-
+        order by sn.serialNumber, ifnull(sn.approve_time, sn.create_time), sn.order_id
     </select>
 
 
+    <select id="listMaintenanceSn" resultType="com.ruoyi.sip.vo.MaintenanceSnVo">
+        SELECT * FROM (
+            SELECT d.product_sn as productSn, t1.id as deliveryId, t1.delivery_time as deliveryTime
+            FROM oms_inventory_delivery t1
+            inner join oms_inventory_delivery_detail d on d.delivery_id = t1.id
+            inner join oms_inventory_outer t3 on t1.outer_code = t3.outer_code
+            WHERE t1.delivery_status = 1
+              and t3.order_code = #{orderCode}
+              and t3.product_code = #{productCode}
+            union all
+            SELECT t2.product_sn, t1.id, t1.delivery_time
+            FROM oms_inventory_delivery t1
+            inner join oms_inventory_info t2 on t1.outer_code = t2.outer_code
+            inner join oms_inventory_outer t3 on t1.outer_code = t3.outer_code
+            WHERE t1.delivery_status = 1
+              and t3.order_code = #{orderCode}
+              and t3.product_code = #{productCode}
+              and not exists (select 1 from oms_inventory_delivery_detail dd where dd.delivery_id = t1.id)
+        ) sn
+        order by sn.deliveryTime, sn.deliveryId, sn.productSn
+    </select>
+
     <insert id="insertInventoryDelivery" parameterType="InventoryDelivery" useGeneratedKeys="true" keyProperty="id">
         insert into oms_inventory_delivery
         <trim prefix="(" suffix=")" suffixOverrides=",">
diff --git a/ruoyi-sip/src/main/resources/mapper/sip/ProjectOrderInfoMapper.xml b/ruoyi-sip/src/main/resources/mapper/sip/ProjectOrderInfoMapper.xml
index 3cc0beb9..f0c106ca 100644
--- a/ruoyi-sip/src/main/resources/mapper/sip/ProjectOrderInfoMapper.xml
+++ b/ruoyi-sip/src/main/resources/mapper/sip/ProjectOrderInfoMapper.xml
@@ -50,6 +50,9 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         <result property="operationVersion"    column="operation_version"    />
         <result property="orderStockingStatus"    column="order_stocking_status"    />
         <result property="rebackApproveStatus"    column="reback_approve_status"    />
+        <result property="relatedOrderId"    column="related_order_id"    />
+        <result property="relatedOrderCode"    column="related_order_code"    />
+        <result property="relatedProjectName"    column="related_project_name"    />
     </resultMap>
 
     <sql id="selectProjectOrderInfoVo">
@@ -57,7 +60,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
                shipment_amount, actual_purchase_amount, order_end_time, delivery_time, company_delivery, notifier,finance_status,
                notifier_email, notifier_phone, duty, duty_email, duty_phone, order_channel, partner_code, supplier,notifier_address,
                remark, order_status, create_by, create_time, update_by, update_time,version_code,process_type,process_template,discount_fold,order_stocking_status,
-                delivery_status,sign_status,outer_status,approve_time,payment_method,payment_ratio,payment_description,order_type,operation_version,reback_approve_status
+                delivery_status,sign_status,outer_status,approve_time,payment_method,payment_ratio,payment_description,order_type,operation_version,reback_approve_status,related_order_id
 
         from project_order_info t1
     </sql>
@@ -67,7 +70,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
                t1.notifier_email, t1.notifier_phone, t1.duty, t1.duty_email, t1.duty_phone, t1.order_channel, t1.partner_code, t1.supplier,
                t1.remark, t1.order_status, t1.create_by, t1.create_time, t1.update_by, t1.update_time,t1.partner_user_name,t1.partner_email
              ,t1.partner_phone,t1.version_code,t1.process_type,t1.process_template,t1.discount_fold,t1.notifier_address,t1.finance_status,
-            t1.delivery_status,t1.sign_status,t1.outer_status,t1.approve_time,t1.payment_method,t1.payment_ratio,t1.payment_description,t1.operation_version,t1.order_stocking_status,t1.reback_approve_status
+            t1.delivery_status,t1.sign_status,t1.outer_status,t1.approve_time,t1.payment_method,t1.payment_ratio,t1.payment_description,t1.operation_version,t1.order_stocking_status,t1.reback_approve_status,t1.related_order_id
                 ,t2.project_code,t2.project_name,t2.project_desc,t2.software_info,t2.hardware_info,t2.terminal_peripheral,t2.server_configuration
              ,t2.management_version,t2.desktop_vm_os_version,t2.vm_spec_quantity,t2.key_problem,t2.joint_trial_result
              ,t2.province,t2.customer_name,t2.customer_code,t2.industry_type,t2.bg_property,t2.agent_code,t2.estimated_order_time
@@ -76,7 +79,10 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         ,t4.agent_name
         ,t5.user_name as duty_name
         ,t6.charge_status,t6.biz_charge_date,t6.finance_charge_date
+        ,rel_order.order_code related_order_code,rel_project.project_name related_project_name
         from project_order_info t1
+        left join project_order_info rel_order on t1.related_order_id = rel_order.id
+        left join project_info rel_project on rel_order.project_id = rel_project.id
         left join project_info t2 on t1.project_id = t2.id
 
         left join partner_info t3 on t1.partner_code=t3.partner_code
@@ -85,6 +91,20 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         left join oms_finance_charge t6 on t1.order_code=t6.order_code
     </sql>
 
+    <!-- 仅维保订单「关联项目」候选：只能是已审批完成的正常订单，可按项目编码、项目名称模糊搜索 -->
+    <select id="selectRelatedCandidateList" parameterType="java.util.Map" resultType="com.ruoyi.sip.domain.ProjectOrderInfo">
+        <include refid="selectProjectOrderInfoRelationVo"/>
+        where ifnull(t1.order_type,'1') = '1' and t1.order_status = '2'
+        <if test="excludeOrderId != null">and t1.id != #{excludeOrderId}</if>
+        <if test="projectCode != null and projectCode != ''">
+            and t2.project_code like concat('%',#{projectCode},'%')
+        </if>
+        <if test="projectName != null and projectName != ''">
+            and t2.project_name like concat('%',#{projectName},'%')
+        </if>
+        order by ifnull(t1.approve_time, t1.create_time) desc, t1.id desc
+    </select>
+
     <select id="selectProjectOrderInfoList" parameterType="ProjectOrderInfo" resultMap="ProjectOrderInfoResult">
         <include refid="selectProjectOrderInfoRelationVo"/>
         where 1=1
@@ -651,6 +671,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="paymentRatio != null">payment_ratio,</if>
             <if test="paymentDescription != null and paymentDescription != ''">payment_description,</if>
             <if test="operationVersion != null">operation_version,</if>
+            <if test="relatedOrderId != null">related_order_id,</if>
          </trim>
         <trim prefix="values (" suffix=")" suffixOverrides=",">
             <if test="projectId != null">#{projectId},</if>
@@ -695,6 +716,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="paymentRatio != null">#{paymentRatio},</if>
             <if test="paymentDescription != null and paymentDescription != ''">#{paymentDescription},</if>
             <if test="operationVersion != null">#{operationVersion},</if>
+            <if test="relatedOrderId != null">#{relatedOrderId},</if>
          </trim>
     </insert>
     <insert id="bakData">
@@ -839,6 +861,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="financeStatus != null and financeStatus != ''">finance_status = #{financeStatus},</if>
             <if test="rebackApproveStatus != null and rebackApproveStatus != ''">reback_approve_status = #{rebackApproveStatus},</if>
             <if test="operationVersion != null">operation_version = #{operationVersion},</if>
+            <if test="relatedOrderId != null">related_order_id = #{relatedOrderId},</if>
         </trim>
         where id = #{id}
     </update>
@@ -847,6 +870,12 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         set reback_approve_status = null
         where id = #{id}
     </update>
+    <!-- 订单类型由仅维保改回正常时清空关联项目：动态update不会写入null，需显式清空 -->
+    <update id="clearRelatedOrderId" parameterType="Long">
+        update project_order_info
+        set related_order_id = null
+        where id = #{id}
+    </update>
     <update id="updateProjectOrderInfoByCode" parameterType="ProjectOrderInfo">
         update project_order_info
         <trim prefix="SET" suffixOverrides=",">