diff --git a/src/main/java/com/actiontech/dble/backend/datasource/PhysicalDbInstance.java b/src/main/java/com/actiontech/dble/backend/datasource/PhysicalDbInstance.java
index 4b967ddaed..01cfa7a938 100644
--- a/src/main/java/com/actiontech/dble/backend/datasource/PhysicalDbInstance.java
+++ b/src/main/java/com/actiontech/dble/backend/datasource/PhysicalDbInstance.java
@@ -391,7 +391,7 @@ boolean canSelectAsReadNode() {
             return false;
         }
         boolean isSync = dbSynStatus == MySQLHeartbeat.DB_SYN_NORMAL;
-        boolean isNotDelay = slaveBehindMaster <= this.dbGroupConfig.getDelayThreshold();
+        boolean isNotDelay = slaveBehindMaster <= (this.dbGroupConfig.getDelayThreshold() / 1000);
         return isSync && isNotDelay;
     }