diff --git a/src/ac/acl/spec/check_spec.py b/src/ac/acl/spec/check_spec.py
index 79ec285f2347a6ce0369f42415fa4a740a288387..468b616eb8a30da5be37207de1985279974421ff 100644
--- a/src/ac/acl/spec/check_spec.py
+++ b/src/ac/acl/spec/check_spec.py
@@ -58,6 +58,17 @@ class CheckSpec(BaseCheck):
 
         return False
 
+    def _is_lts_branch(self):
+        """
+        check if lts branch
+        :return boolean
+        """
+        if self._tbranch:
+            if "lts" in self._tbranch.lower():
+                return True
+
+        return False
+
     def check_version(self):
         """
         检查当前版本号是否比上一个commit新
@@ -81,6 +92,13 @@ class CheckSpec(BaseCheck):
 
         self._ex_pkgship(spec_o)
 
+        # if lts branch, version update is forbidden
+        if self._is_lts_branch():
+            logger.debug("lts branch {}".format(self._tbranch))
+            if RPMSpecAdapter.compare_version(self._spec.version, spec_o.version) == 1:
+                logger.error("version update of lts branch is forbidden")
+                return FAILED
+
         if self._spec > spec_o:
             return SUCCESS
         elif self._spec < spec_o:
@@ -181,5 +199,6 @@ class CheckSpec(BaseCheck):
     def __call__(self, *args, **kwargs):
         logger.info("check {} spec ...".format(self._repo))
         self._ex_exclusive_arch()
+        self._tbranch = kwargs.get("tbranch", None)
 
         return self.start_check()
diff --git a/src/ac/framework/ac.py b/src/ac/framework/ac.py
index c5084197534573236f1f6813867d3f75bbeb33a7..f2febf6cf2ff499af96e27bbf91be9e2921c32b9 100644
--- a/src/ac/framework/ac.py
+++ b/src/ac/framework/ac.py
@@ -41,7 +41,7 @@ class AC(object):
 
         logger.debug("check list: {}".format(self._ac_check_elements))
 
-    def check_all(self, workspace, repo):
+    def check_all(self, workspace, repo, **kwargs):
         """
         门禁检查
         :param workspace:
@@ -84,7 +84,7 @@ class AC(object):
 
             # do ac check
             try:
-                result = entry()
+                result = entry(**kwargs)
                 logger.debug("check result {} {}".format(element, result))
             except Exception as exc:
                 logger.exception("check exception, {} {}".format(element, exc))
@@ -146,6 +146,7 @@ if "__main__" == __name__:
     args = argparse.ArgumentParser()
     args.add_argument("-w", type=str, dest="workspace", help="workspace where to find source")
     args.add_argument("-r", type=str, dest="repo", help="repo name")
+    args.add_argument("-b", type=str, dest="tbranch", help="branch merge to")
     args.add_argument("-n", type=str, dest="owner", default="src-openeuler", help="gitee owner")
     args.add_argument("-o", type=str, dest="output", help="output file to save result")
     args.add_argument("-p", type=str, dest="pr", help="pull request number")
@@ -168,5 +169,5 @@ if "__main__" == __name__:
     gp.create_tags_of_pr(args.pr, "ci_processing")
 
     ac = AC(os.path.join(os.path.dirname(os.path.realpath(__file__)), "ac.yaml"))
-    ac.check_all(workspace=args.workspace, repo=args.repo)
+    ac.check_all(workspace=args.workspace, repo=args.repo, tbranch=args.tbranch)
     ac.save(args.output)