diff --git a/daemon.py b/daemon.py
index 721434f..7fbcd9b 100644
--- a/daemon.py
+++ b/daemon.py
@@ -65,6 +65,7 @@
     print("[client]" + str(msg.payload))
 
 def verify_card(msg):
+    DB_connection_check()
     card_number = '{:010d}'.format(int(msg.payload))
     status = AuthStatus.EXCEPTION
     try:
diff --git a/db_models.py b/db_models.py
index 13f209c..21595b0 100644
--- a/db_models.py
+++ b/db_models.py
@@ -26,11 +26,7 @@
 def DB_Init():
     mysql_db.connect() #连接数据库
     mysql_db.create_tables([AccountInfo, AccessRecords], safe=True)
-    # AccountInfo.create(
-    #             realname = 'good one',
-    #             studnum  = '2017011234',
-    #             cardnum  = '0000080801',
-    #             cardtype = 2,
-    #             userid = 'test',
-    #             ).save()
+
+def DB_connection_check():
+    mysql_db.get_conn().ping(True)