diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index ddaccfe..d6950dc 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -1691,12 +1691,13 @@ public class TaskService {
         }
         
         // 验证任务是否是流水线任务
-        // 特殊情况：一级需求部门任务在待完善明细状态下，允许将非流水线任务转换为流水线任务
-        boolean isPrimaryTaskPendingDetail = existTask.getIsPrimaryTask() != null 
+        // 特殊情况：一级需求部门任务在草稿或待完善明细状态下，允许将非流水线任务转换为流水线任务
+        boolean isPrimaryTaskCanConvert = existTask.getIsPrimaryTask() != null 
                 && existTask.getIsPrimaryTask() == 1 
-                && "pending_detail_completion".equals(existTask.getApprovalStatus());
+                && ("pending_detail_completion".equals(existTask.getApprovalStatus()) 
+                    || "draft".equals(existTask.getApprovalStatus()));
         
-        if ((existTask.getIsPipeline() == null || existTask.getIsPipeline() != 1) && !isPrimaryTaskPendingDetail) {
+        if ((existTask.getIsPipeline() == null || existTask.getIsPipeline() != 1) && !isPrimaryTaskCanConvert) {
             throw new BusinessException(ResultCode.PARAM_ERROR, "该任务不是流水线任务");
         }