diff --git a/dbm-ui/backend/flow/engine/bamboo/scene/spider/spider_checksum.py b/dbm-ui/backend/flow/engine/bamboo/scene/spider/spider_checksum.py
index f5b5278cf6..684f897c2a 100644
--- a/dbm-ui/backend/flow/engine/bamboo/scene/spider/spider_checksum.py
+++ b/dbm-ui/backend/flow/engine/bamboo/scene/spider/spider_checksum.py
@@ -124,7 +124,7 @@ def spider_checksum_flow(self):
         )
         sub_pipelines = []
 
-        ran_str = get_random_string(length=8)
+        ran_str = get_random_string(length=8).lower()
         random_account = "{}{}".format(ACCOUNT_PREFIX, ran_str)
         ran_str_obj = {"ran_str": ran_str}