diff --git a/sf_machine_connect/controllers/controllers.py b/sf_machine_connect/controllers/controllers.py
index 92dc99c7..10917dc6 100644
--- a/sf_machine_connect/controllers/controllers.py
+++ b/sf_machine_connect/controllers/controllers.py
@@ -1298,7 +1298,7 @@ class Sf_Dashboard_Connect(http.Controller):
         conn = psycopg2.connect(**db_config)
         # 获取请求的机床数据
         machine_list = ast.literal_eval(kw['machine_list'])
-        time_threshold = datetime.now() - timedelta(days=1)
+        time_threshold = datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)
 
         alarm_last_24_time = 0.0
         alarm_all_time = 0.0