diff --git a/internlm/monitor/monitor.py b/internlm/monitor/monitor.py
index 6a3b9dc..dbc9dda 100644
--- a/internlm/monitor/monitor.py
+++ b/internlm/monitor/monitor.py
@@ -53,6 +53,7 @@ class MonitorTracker(Thread):
         self.last_active_time = -1
         self.last_loss_value = -1
         self.stopped = False
+        self.daemon = True
         self.start()
 
     def run(self):