diff --git a/backend/ai_services/services.py b/backend/ai_services/services.py
index 222eb71..ee4af94 100644
--- a/backend/ai_services/services.py
+++ b/backend/ai_services/services.py
@@ -1,6 +1,7 @@
 import json
 import logging
 import time
+import uuid
 import oss2
 from aliyunsdkcore.client import AcsClient
 from aliyunsdkcore.acs_exception.exceptions import ClientException, ServerException
@@ -76,7 +77,7 @@ class AliyunTingwuService:
         input_param = {
             "FileUrl": file_url,
             "SourceLanguage": language,
-            "TaskKey": "transcription_task" 
+            "TaskKey": str(uuid.uuid4())
         }
         request.set_Input(json.dumps(input_param))