diff --git a/src/main/resources/templates/admin/project_list.ftl b/src/main/resources/templates/admin/project_list.ftl
index 72ba7e2..63e439c 100644
--- a/src/main/resources/templates/admin/project_list.ftl
+++ b/src/main/resources/templates/admin/project_list.ftl
@@ -382,7 +382,7 @@
                     <h4 class="modal-title" id="myModalLabel">您正在编辑项目编号</h4>
                 </div>
                 <div>
-                    <input type="text" id="newProjectNo" class="am-modal-prompt-input" placeholder="请输入项目编号"/>
+                    <input type="text" id="newProjectNo" class="am-modal-prompt-input" placeholder="请输入项目编号" maxlength="50"/>
                     <input type="hidden" id="modelId" name="keywords" value=''/>
                 </div>
                 <div class="modal-footer">