diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index fba4c62..851ab6b 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -1665,7 +1665,9 @@ public class TaskService {
         
         // 验证权限：任务发布人、一级需求任务的明细完善人可以更新任务
         boolean isAdmin = isAdminUser(userId);
-        boolean isPrimaryTaskDetailCompleter = "pending_detail_completion".equals(existTask.getApprovalStatus()) 
+        // 对于一级需求任务，明细完善人在任何可编辑状态下都可以更新（包括草稿状态）
+        boolean isPrimaryTaskDetailCompleter = existTask.getIsPrimaryTask() != null 
+                && existTask.getIsPrimaryTask() == 1
                 && existTask.getDetailCompleterId() != null 
                 && userId.equals(existTask.getDetailCompleterId());