diff --git a/src/main/resources/static/assets/js/project_budget_plan.js b/src/main/resources/static/assets/js/project_budget_plan.js
index 069e11c..d3440f5 100644
--- a/src/main/resources/static/assets/js/project_budget_plan.js
+++ b/src/main/resources/static/assets/js/project_budget_plan.js
@@ -297,27 +297,7 @@ function updateEachUnderwrittenPlan() {
             prevFundBalance = 0;
         }
 
-        var underwrittenPlan = 0;
-
-        if(!income || !cost){
-            //数据还不全的时候
-            underwrittenPlan = NaN;
-        }else {
-
-            if (income - cost >= 0) {
-                underwrittenPlan = 0;
-            } else {
-                if (prevFundBalance < 0) {
-                    underwrittenPlan = cost - income;
-                } else {
-                    if (prevFundBalance <= cost - income) {
-                        underwrittenPlan = cost - income - prevFundBalance;
-                    } else {
-                        underwrittenPlan = 0;
-                    }
-                }
-            }
-        }
+        var underwrittenPlan = calUnderwrittenPlan(income, cost, prevFundBalance);
 
         total += underwrittenPlan;
 
@@ -327,6 +307,39 @@ function updateEachUnderwrittenPlan() {
     //总垫资计划=所有月累加
     $(".input-total-underwritten-plan-budget-plan").val(total);
 }
+
+/**
+ * 计算垫资计划
+ * @param income 收入
+ * @param cost 支出
+ * @param prevFundBalance 上月余额
+ */
+function calUnderwrittenPlan(income, cost, prevFundBalance) {
+    var underwrittenPlan = 0;
+
+    if(!income || !cost){
+        //数据还不全的时候
+        underwrittenPlan = NaN;
+    }else {
+
+        if (income - cost >= 0) {
+            underwrittenPlan = 0;
+        } else {
+            if (prevFundBalance < 0) {
+                underwrittenPlan = cost - income;
+            } else {
+                if (prevFundBalance <= cost - income) {
+                    underwrittenPlan = cost - income - prevFundBalance;
+                } else {
+                    underwrittenPlan = 0;
+                }
+            }
+        }
+    }
+
+    return underwrittenPlan;
+}
+
 /**
  * 更新每一行【即每个月】的还款计划
  */
@@ -344,27 +357,8 @@ function updateEachRepaymentPlan() {
             prevFundBalance = 0;
         }
 
-        var repaymentPlan = 0;
-
-        if(!income || !cost){
-            //数据还不全的时候
-            repaymentPlan = NaN;
-        }else {
-            if(income - cost <= 0){
-                repaymentPlan = 0;
-            }else {
-                if(prevFundBalance >= 0){
-                    repaymentPlan = 0;
-                }else {
-                    if(income - cost <= -prevFundBalance){
-                        repaymentPlan = income - cost;
-                    }else {
-                        repaymentPlan = -prevFundBalance;
-                    }
-                }
-            }
-        }
 
+        var repaymentPlan = calRepaymentPlan(income, cost, prevFundBalance);
 
         total += repaymentPlan;
 
@@ -375,6 +369,38 @@ function updateEachRepaymentPlan() {
     //总回款计划=所有月累加
     $(".input-total-repayment-plan-budget-plan").val(total);
 }
+
+/**
+ * 计算回款计划
+ * @param income 收入
+ * @param cost 支出
+ * @param prevFundBalance 上月余额
+ */
+function calRepaymentPlan(income, cost, prevFundBalance) {
+    var repaymentPlan = 0;
+
+    if(!income || !cost){
+        //数据还不全的时候
+        repaymentPlan = NaN;
+    }else {
+        if(income - cost <= 0){
+            repaymentPlan = 0;
+        }else {
+            if(prevFundBalance >= 0){
+                repaymentPlan = 0;
+            }else {
+                if(income - cost <= -prevFundBalance){
+                    repaymentPlan = income - cost;
+                }else {
+                    repaymentPlan = -prevFundBalance;
+                }
+            }
+        }
+    }
+
+    return repaymentPlan;
+}
+
 /**
  * 更新每一行【即每个月】的资金利息
  */