diff --git a/src/main/java/com/actiontech/dble/backend/heartbeat/MySQLHeartbeatStatus.java b/src/main/java/com/actiontech/dble/backend/heartbeat/MySQLHeartbeatStatus.java
index 2e09df0aa..a9541163e 100644
--- a/src/main/java/com/actiontech/dble/backend/heartbeat/MySQLHeartbeatStatus.java
+++ b/src/main/java/com/actiontech/dble/backend/heartbeat/MySQLHeartbeatStatus.java
@@ -1,5 +1,11 @@
 package com.actiontech.dble.backend.heartbeat;
 
 public enum MySQLHeartbeatStatus {
-    INIT(), OK(), ERROR(), TIMEOUT(), STOP()
+    INIT(), OK(), ERROR(), TIMEOUT(), STOP();
+
+    @Override
+    public String toString() {
+        return super.toString().toLowerCase();
+    }
+
 }