diff --git a/backend/src/main/java/com/designhub/controller/UserController.java b/backend/src/main/java/com/designhub/controller/UserController.java
index 3076b5f..85369b4 100644
--- a/backend/src/main/java/com/designhub/controller/UserController.java
+++ b/backend/src/main/java/com/designhub/controller/UserController.java
@@ -34,9 +34,10 @@ public class UserController {
         @RequestParam(defaultValue = "10") int pageSize,
         @RequestParam(required = false) String keyword,
         @RequestParam(required = false) Long deptId,
-        @RequestParam(required = false) Integer status
+        @RequestParam(required = false) Integer status,
+        @RequestParam(required = false, defaultValue = "false") Boolean includeChildren
     ) {
-        return Result.success(userService.getUserList(pageNum, pageSize, keyword, deptId, status));
+        return Result.success(userService.getUserList(pageNum, pageSize, keyword, deptId, status, includeChildren));
     }
 
     @Operation(summary = "获取全部用户列表")
diff --git a/backend/src/main/java/com/designhub/service/UserService.java b/backend/src/main/java/com/designhub/service/UserService.java
index 94fdc8b..c194b36 100644
--- a/backend/src/main/java/com/designhub/service/UserService.java
+++ b/backend/src/main/java/com/designhub/service/UserService.java
@@ -75,6 +75,13 @@ public class UserService {
      * 分页查询用户列表
      */
     public Page<User> getUserList(int pageNum, int pageSize, String keyword, Long deptId, Integer status) {
+        return getUserList(pageNum, pageSize, keyword, deptId, status, false);
+    }
+    
+    /**
+     * 分页查询用户列表（支持包含子部门）
+     */
+    public Page<User> getUserList(int pageNum, int pageSize, String keyword, Long deptId, Integer status, Boolean includeChildren) {
         Page<User> page = new Page<>(pageNum, pageSize);
         
         LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<>();
@@ -90,7 +97,16 @@ public class UserService {
             );
         }
         if (deptId != null) {
-            queryWrapper.eq(User::getDeptId, deptId);
+            if (includeChildren != null && includeChildren) {
+                // 包含子部门：获取当前部门及所有子部门的ID列表
+                List<Long> deptIds = departmentService.getAllChildDeptIds(deptId);
+                deptIds.add(deptId); // 包含当前部门
+                queryWrapper.in(User::getDeptId, deptIds);
+                log.info("查询用户列表，包含子部门: deptId={}, 所有部门IDs={}", deptId, deptIds);
+            } else {
+                // 只查询当前部门
+                queryWrapper.eq(User::getDeptId, deptId);
+            }
         }
         if (status != null) {
             queryWrapper.eq(User::getStatus, status);
diff --git a/frontend/src/api/user.ts b/frontend/src/api/user.ts
index cf21a95..ff23873 100644
--- a/frontend/src/api/user.ts
+++ b/frontend/src/api/user.ts
@@ -32,12 +32,14 @@ export const getUserList = async (
   pageSize: number = 10,
   keyword?: string,
   deptId?: number,
-  status?: number
+  status?: number,
+  includeChildren?: boolean
 ): Promise<PageResult<User>> => {
   const params: any = { pageNum, pageSize };
   if (keyword) params.keyword = keyword;
   if (deptId) params.deptId = deptId;
   if (status !== undefined) params.status = status;
+  if (includeChildren !== undefined) params.includeChildren = includeChildren;
 
   const response = await request.get('/users', { params });
   return response.data;
diff --git a/frontend/src/views/TaskHall.vue b/frontend/src/views/TaskHall.vue
index f839436..6acc76f 100644
--- a/frontend/src/views/TaskHall.vue
+++ b/frontend/src/views/TaskHall.vue
@@ -5434,14 +5434,16 @@ const handleApprovePrimaryTask = async (task: Task) => {
       return
     }
     
-    // 获取部门成员
-    const response = await userApi.getUserList(1, 100, undefined, deptId, 1)
+    // 获取部门成员（包含所有子部门）
+    const response = await userApi.getUserList(1, 1000, undefined, deptId, 1, true)
     deptMembersList.value = (response.records || []).map(u => ({
       id: u.id!,
       realName: u.realName || u.username,
       username: u.username
     }))
     
+    console.log(`获取到${deptMembersList.value.length}个部门成员（含子部门）`)
+    
     primaryApproveTaskData.value = task
     primaryApproveCompleterId.value = undefined
     primaryApproveComment.value = ''