diff --git a/backend/src/main/java/com/designhub/service/TaskApprovalService.java b/backend/src/main/java/com/designhub/service/TaskApprovalService.java
index 650c113..95a5769 100644
--- a/backend/src/main/java/com/designhub/service/TaskApprovalService.java
+++ b/backend/src/main/java/com/designhub/service/TaskApprovalService.java
@@ -203,7 +203,13 @@ public class TaskApprovalService {
 
         // 判断是否为流水线任务
         if (task.getIsPipeline() != null && task.getIsPipeline() == 1) {
-            // 流水线任务：拆分子任务
+            // 流水线任务：先保存主任务的receiverId（如果已设置），确保updatePipelineSubTasksForAssigned能读取到
+            if (finalReceiverId != null) {
+                task.setStatus("pending"); // 临时状态，splitIntoPipelineSubTasks会更新
+                taskMapper.updateById(task);
+                log.info("流水线任务主任务receiverId已保存：taskId={}, receiverId={}", task.getId(), finalReceiverId);
+            }
+            // 拆分子任务
             splitIntoPipelineSubTasks(task);
         } else {
             // 普通任务：根据是否有接收人设置状态