diff --git a/tests/pytest/alter/alterTimestampColDataProcess.py b/tests/pytest/alter/alterTimestampColDataProcess.py
new file mode 100644
index 0000000000000000000000000000000000000000..b235a8bf4c0c7166b66f87642d477ba78bccc44d
--- /dev/null
+++ b/tests/pytest/alter/alterTimestampColDataProcess.py
@@ -0,0 +1,73 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug(f"start to execute {__file__}")
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.execute("drop database if exists db")
+        tdSql.execute("create database  if not exists db keep 36500")
+        tdSql.execute("use db")
+
+        tdLog.printNoPrefix("==========step1:create table && insert data")
+        # timestamp list:
+        #   0 -> "1970-01-01 08:00:00" | -28800000 -> "1970-01-01 00:00:00" | -946800000000 -> "1940-01-01 00:00:00"
+        #   -631180800000 -> "1950-01-01 00:00:00"
+        ts1 = 0
+        ts2 = -28800000
+        ts3 = -946800000000
+        ts4 = "1950-01-01 00:00:00"
+        tdSql.execute(
+            "create table stb2ts (ts timestamp, ts1 timestamp, ts2 timestamp, c1 int, ts3 timestamp) TAGS(t1 int)"
+        )
+        tdSql.execute("create table t2ts1 using stb2ts tags(1)")
+
+        tdSql.execute(f"insert into t2ts1 values ({ts1}, {ts1}, {ts1}, 1, {ts1})")
+        tdSql.execute(f"insert into t2ts1 values ({ts2}, {ts2}, {ts2}, 2, {ts2})")
+        tdSql.execute(f"insert into t2ts1 values ({ts3}, {ts3}, {ts3}, 4, {ts3})")
+        tdSql.execute(f"insert into t2ts1 values ('{ts4}', '{ts4}', '{ts4}', 3, '{ts4}')")
+
+        tdLog.printNoPrefix("==========step2:check inserted data")
+        tdSql.query("select * from stb2ts where ts1=0 and ts2='1970-01-01 08:00:00' ")
+        tdSql.checkRows(1)
+        tdSql.checkData(0, 4,'1970-01-01 08:00:00')
+
+        tdSql.query("select * from stb2ts where ts1=-28800000 and ts2='1970-01-01 00:00:00' ")
+        tdSql.checkRows(1)
+        tdSql.checkData(0, 4, '1970-01-01 00:00:00')
+
+        tdSql.query("select * from stb2ts where ts1=-946800000000 and ts2='1940-01-01 00:00:00' ")
+        tdSql.checkRows(1)
+        tdSql.checkData(0, 4, '1940-01-01 00:00:00')
+
+        tdSql.query("select * from stb2ts where ts1=-631180800000 and ts2='1950-01-01 00:00:00' ")
+        tdSql.checkRows(1)
+        tdSql.checkData(0, 4, '1950-01-01 00:00:00')
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index c26dc8ae2f31be2ac93860420d3ad0d61a7b58ba..b7c3bfe4ac49526d8406bebd1fa7b37149a83c95 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -238,6 +238,7 @@ python3 ./test.py -f stream/table_n.py
 #alter table
 python3 ./test.py -f alter/alter_table_crash.py
 python3 ./test.py -f alter/alterTabAddTagWithNULL.py
+python3 ./test.py -f alter/alterTimestampColDataProcess.py
 
 # client
 python3 ./test.py -f client/client.py