diff --git a/taptap/collect_mongodb.py b/taptap/collect_mongodb.py
index 4901da1..23c5309 100644
--- a/taptap/collect_mongodb.py
+++ b/taptap/collect_mongodb.py
@@ -128,7 +128,7 @@ class CollectMongo():
                         line[key] = json.dumps(line[key])
 
                 line['account_id'] = str(line['object_id'])
-
+                line['#time'] = line['createdAt']
                 try:
                     line['tags'] = ",".join(json.loads(line['tags']))
                 except Exception: