diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index 845bad4..88627a3 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -4137,6 +4137,16 @@ public class TaskService {
         
         Long receiverId = mainTask.getReceiverId();
         Long receiverDeptId = mainTask.getReceiverDeptId();
+        String receiverName = null;
+        if (receiverId != null) {
+            User receiver = userService.getUserById(receiverId);
+            if (receiver != null) {
+                receiverName = receiver.getRealName() != null ? receiver.getRealName() : receiver.getUsername();
+                if (receiverDeptId == null) {
+                    receiverDeptId = receiver.getDeptId();
+                }
+            }
+        }
         
         List<TaskItem> taskItems = taskItemMapper.selectList(
             new LambdaQueryWrapper<TaskItem>()
@@ -4192,17 +4202,15 @@ public class TaskService {
                 if (itemDeptIndex == firstDeptIndex) {
                     item.setStatus("in_progress");
                     item.setIsLocked(0);
-                    // 指派模式下：如果子任务已有预先指定的接收人，保留；否则使用主任务的接收人
-                    if (item.getReceiverId() == null && receiverId != null) {
+                    // 指派模式下：以主任务的接收人为准，避免主任务与子任务接收人不一致
+                    if (receiverId != null) {
                         item.setReceiverId(receiverId);
+                        item.setReceiverName(receiverName);
                         if (receiverDeptId != null) {
                             item.setReceiverDeptId(receiverDeptId);
                         }
-                        log.info("顺序流水线第一部门子任务 {} 设置接收人: receiverId={}, deptId={}", 
+                        log.info("顺序流水线第一部门子任务 {} 同步接收人: receiverId={}, deptId={}", 
                                 item.getId(), receiverId, receiverDeptId);
-                    } else {
-                        log.info("顺序流水线第一部门子任务 {} 保留预先指定的接收人: receiverId={}", 
-                                item.getId(), item.getReceiverId());
                     }
                     // 计算并设置deadline（使用工作时间计算）
                     if (item.getEstimatedHours() != null && item.getEstimatedHours().compareTo(BigDecimal.ZERO) > 0) {