diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index 851ab6b..84c952e 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -1671,7 +1671,22 @@ public class TaskService {
                 && existTask.getDetailCompleterId() != null 
                 && userId.equals(existTask.getDetailCompleterId());
         
-        if (!isAdmin && !userId.equals(existTask.getPublisherId()) && !isPrimaryTaskDetailCompleter) {
+        // 对于一级需求任务在待完善明细状态，需求部门的成员都可以编辑
+        boolean isDemandDeptMemberForPrimaryTask = false;
+        if (existTask.getIsPrimaryTask() != null && existTask.getIsPrimaryTask() == 1 
+                && "pending_detail_completion".equals(existTask.getApprovalStatus())) {
+            // 获取当前用户的部门类型
+            User currentUser = userMapper.selectById(userId);
+            if (currentUser != null && currentUser.getDeptId() != null) {
+                Department userDept = departmentMapper.selectById(currentUser.getDeptId());
+                if (userDept != null && "demand".equals(userDept.getDeptType())) {
+                    isDemandDeptMemberForPrimaryTask = true;
+                    log.info("需求部门成员 {} 编辑一级需求任务 {}", userId, id);
+                }
+            }
+        }
+        
+        if (!isAdmin && !userId.equals(existTask.getPublisherId()) && !isPrimaryTaskDetailCompleter && !isDemandDeptMemberForPrimaryTask) {
             throw new BusinessException(ResultCode.FORBIDDEN, "只有任务发布人或指定的明细完善人可以更新任务");
         }