diff --git a/backend/SystemUpdater/UpdateManager.py b/backend/SystemUpdater/UpdateManager.py
index 4c23832..d929c74 100644
--- a/backend/SystemUpdater/UpdateManager.py
+++ b/backend/SystemUpdater/UpdateManager.py
@@ -1,6 +1,6 @@
 # UpdateManager.py
 # -*- Mode: Python; indent-tabs-mode: nil; tab-width: 4; coding: utf-8 -*-
-import os
+import os,apt
 import apt_pkg
 import sys
 import time
@@ -747,6 +747,7 @@ class UpdateManager():
                 self._is_broken = False
         except KeyError:
             pass
+        # except apt
         except Exception as e:
             logging.error(str(e))
         self._need_downgrade = False
diff --git a/backend/SystemUpdater/UpdateManagerDbus.py b/backend/SystemUpdater/UpdateManagerDbus.py
index d10ce42..e4aa282 100755
--- a/backend/SystemUpdater/UpdateManagerDbus.py
+++ b/backend/SystemUpdater/UpdateManagerDbus.py
@@ -370,13 +370,22 @@ class UpdateManagerDbusController(dbus.service.Object):
             if str(user_lang) == '':
                 logging.info("The incoming language is null...")
             else:
-                (lang, encoding) = locale._parse_localename(str(user_lang))
+                (input_lang, encoding) = locale._parse_localename(str(user_lang))
+                (local_lang, encoding) = locale._parse_localename(str(os.environ["LANG"]))
+                (local_language, encoding) = locale._parse_localename(str(os.environ["LANGUAGE"]))
+                
                 #合法性的校验
-                if lang == None or lang == '':
+                if input_lang == None or input_lang == '':
                     logging.info("The incoming language is Illegal...")
-                if lang != os.environ["LANGUAGE"]:
-                    logging.warning("The system language is switched %s to %s",os.environ["LANGUAGE"],lang)
-                    os.environ["LANGUAGE"] = lang
+                    return self.parent.now_working
+
+                #处于更新和升级中的话 不进行更新
+                if input_lang != local_language or input_lang != local_lang:
+                    logging.warning("LANG: switched %s to %s",os.environ["LANG"],user_lang)
+                    logging.warning("LANGUAGE: switched %s to %s",os.environ["LANGUAGE"],user_lang)
+                    os.environ["LANG"] = user_lang
+                    os.environ["LANGUAGE"] = user_lang
+                    self.parent.aptd_lang_switch = True
                     reload(enums)
             sender_name = get_proc_from_dbus_name(sender)
             logging.info(COLORMETHOR_PREFIX+'Method'+COLORLOG_SUFFIX+' DistPurgePackages Sender:%s and purge list is:%s...',sender_name,_purge_list)
@@ -441,13 +450,22 @@ class UpdateManagerDbusController(dbus.service.Object):
             if str(user_lang) == '':
                 logging.info("The incoming language is null...")
             else:
-                (lang, encoding) = locale._parse_localename(str(user_lang))
+                (input_lang, encoding) = locale._parse_localename(str(user_lang))
+                (local_lang, encoding) = locale._parse_localename(str(os.environ["LANG"]))
+                (local_language, encoding) = locale._parse_localename(str(os.environ["LANGUAGE"]))
+                
                 #合法性的校验
-                if lang == None or lang == '':
+                if input_lang == None or input_lang == '':
                     logging.info("The incoming language is Illegal...")
-                if lang != os.environ["LANGUAGE"]:
-                    logging.warning("The system language is switched %s to %s",os.environ["LANGUAGE"],lang)
-                    os.environ["LANGUAGE"] = lang
+                    return self.parent.now_working
+
+                #处于更新和升级中的话 不进行更新
+                if input_lang != local_language or input_lang != local_lang:
+                    logging.warning("LANG: switched %s to %s",os.environ["LANG"],user_lang)
+                    logging.warning("LANGUAGE: switched %s to %s",os.environ["LANGUAGE"],user_lang)
+                    os.environ["LANG"] = user_lang
+                    os.environ["LANGUAGE"] = user_lang
+                    self.parent.aptd_lang_switch = True
                     reload(enums)
             sender_name = get_proc_from_dbus_name(sender)
             self._check_prohibit_user(sender_name)
@@ -750,7 +768,7 @@ class UpdateManagerDbusController(dbus.service.Object):
             if not os.path.exists("/etc/kylin-version/kylin-system-version.conf"): 
                 logging.warning("System version file doesn't exist.")
                 update_version,os_version = self.parent.sqlite3_server.get_default_version()
-                return os_version,update_version
+                return str(os_version),str(update_version)
             os_version = str(self.parent.sqlite3_server.ucconfigs.get("SYSTEM","os_version"))
             update_version = str(self.parent.sqlite3_server.ucconfigs.get("SYSTEM","update_version"))
         except Exception as e: