diff --git a/tests/army/frame/autogen.py b/tests/army/frame/autogen.py
index bbcbf9ad9a..d1f02e7865 100644
--- a/tests/army/frame/autogen.py
+++ b/tests/army/frame/autogen.py
@@ -163,16 +163,18 @@ class AutoGen:
             values = ""
 
         tdLog.info(f" insert child data {child_name} finished, insert rows={cnt}")
-        self.ts = ts
+        return ts
 
     def insert_data(self, cnt, bContinue=False):
         if not bContinue:
             self.ts = 1600000000000
 
+        currTs = 1600000000000
         for i in range(self.child_cnt):
             name = f"{self.child_name}{i}"
-            self.insert_data_child(name, cnt, self.batch_size, 1)
+            currTs = self.insert_data_child(name, cnt, self.batch_size, 1)
 
+        self.ts = currTs
         tdLog.info(f" insert data ok, child table={self.child_cnt} insert rows={cnt}")
 
     # insert same timestamp to all childs