diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/discovery/NacosServiceDiscovery.java b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/discovery/NacosServiceDiscovery.java
index a0373189..7818a295 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/discovery/NacosServiceDiscovery.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/discovery/NacosServiceDiscovery.java
@@ -96,7 +96,6 @@ public class NacosServiceDiscovery {
 			metadata.putAll(instance.getMetadata());
 		}
 		metadata.put("nacos.ephemeral",String.valueOf(instance.isEphemeral()));
-		metadata.putAll(instance.getMetadata());
 		nacosServiceInstance.setMetadata(metadata);
 
 		if (metadata.containsKey("secure")) {