diff --git a/sermant-plugins/sermant-service-registry/spring-cloud-registry-plugin/src/main/java/com/huawei/registry/interceptors/cloud3/x/ZookeeperInstanceSupplierInterceptor.java b/sermant-plugins/sermant-service-registry/spring-cloud-registry-plugin/src/main/java/com/huawei/registry/interceptors/cloud3/x/ZookeeperInstanceSupplierInterceptor.java
index d0dc54a696..3764b92c88 100644
--- a/sermant-plugins/sermant-service-registry/spring-cloud-registry-plugin/src/main/java/com/huawei/registry/interceptors/cloud3/x/ZookeeperInstanceSupplierInterceptor.java
+++ b/sermant-plugins/sermant-service-registry/spring-cloud-registry-plugin/src/main/java/com/huawei/registry/interceptors/cloud3/x/ZookeeperInstanceSupplierInterceptor.java
@@ -18,6 +18,7 @@
 
 import com.huawei.registry.context.RegisterContext;
 import com.huawei.registry.support.InstanceInterceptorSupport;
+import com.huawei.registry.utils.HostUtils;
 
 import com.huaweicloud.sermant.core.plugin.agent.entity.ExecuteContext;
 
@@ -26,7 +27,6 @@
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
-import java.util.Objects;
 import java.util.stream.Collectors;
 
 /**
@@ -56,7 +56,7 @@ private List<ServiceInstance> getMergedInstances(ExecuteContext context) {
         // 全量服务实例
         final Object allServiceInstances = context.getArguments()[0];
         final List<ServiceInstance> serviceInstances = filterDiscoveryServiceInstance(
-            (List<ServiceInstance>) allServiceInstances);
+                (List<ServiceInstance>) allServiceInstances);
         if (originServiceInstances instanceof List) {
             return convertAndMerge(serviceInstances, (List<ServiceInstance>) originServiceInstances);
         }
@@ -72,17 +72,23 @@ private List<ServiceInstance> getMergedInstances(ExecuteContext context) {
      */
     private List<ServiceInstance> filterDiscoveryServiceInstance(List<ServiceInstance> serviceInstances) {
         return serviceInstances.stream()
-            .filter(serviceInstance -> SERVICE_INSTANCE_CLASS_NAME.equals(serviceInstance.getClass().getName()))
-            .collect(Collectors.toList());
+                .filter(serviceInstance -> SERVICE_INSTANCE_CLASS_NAME.equals(serviceInstance.getClass().getName()))
+                .collect(Collectors.toList());
     }
 
     private List<ServiceInstance> convertAndMerge(List<ServiceInstance> microServiceInstances,
-        List<ServiceInstance> originServiceInstances) {
-        List<ServiceInstance> result = new ArrayList<>(microServiceInstances);
+            List<ServiceInstance> originServiceInstances) {
+        List<ServiceInstance> result = new ArrayList<>();
         if (isOpenMigration() && RegisterContext.INSTANCE.isAvailable()) {
             result.addAll(originServiceInstances);
         }
-        return result.stream().distinct().filter(Objects::nonNull).collect(Collectors.toList());
+        for (ServiceInstance microServiceInstance : microServiceInstances) {
+            result.removeIf(originServiceInstance ->
+                    HostUtils.isSameInstance(originServiceInstance.getHost(), originServiceInstance.getPort(),
+                            microServiceInstance.getHost(), microServiceInstance.getPort()));
+            result.add(microServiceInstance);
+        }
+        return result;
     }
 
     /**
diff --git a/sermant-plugins/sermant-service-registry/spring-cloud-registry-plugin/src/test/java/com/huawei/registry/interceptors/cloud3/x/ZookeeperInstanceSupplierInterceptorTest.java b/sermant-plugins/sermant-service-registry/spring-cloud-registry-plugin/src/test/java/com/huawei/registry/interceptors/cloud3/x/ZookeeperInstanceSupplierInterceptorTest.java
index 76c7e69939..7951d631fa 100644
--- a/sermant-plugins/sermant-service-registry/spring-cloud-registry-plugin/src/test/java/com/huawei/registry/interceptors/cloud3/x/ZookeeperInstanceSupplierInterceptorTest.java
+++ b/sermant-plugins/sermant-service-registry/spring-cloud-registry-plugin/src/test/java/com/huawei/registry/interceptors/cloud3/x/ZookeeperInstanceSupplierInterceptorTest.java
@@ -82,6 +82,16 @@ public void doAfter() throws NoSuchMethodException {
         Assert.assertTrue(result instanceof List);
         List<ServiceInstance> instances = (List<ServiceInstance>) result;
         assertEquals(instances.size(), (scInstances.size() + originInstances.size()));
+
+        // 测试去重
+        scInstances.clear();
+        originInstances.clear();
+        allInstances.clear();
+        final ExecuteContext contextRepeat = interceptor.doAfter(buildContextRepeatedly());
+        final Object resultRepeat = contextRepeat.getResult();
+        Assert.assertTrue(resultRepeat instanceof List);
+        List<ServiceInstance> instancesRepeat = (List<ServiceInstance>) resultRepeat;
+        assertEquals(instancesRepeat.size(), (scInstances.size() + originInstances.size() - 1));
         RegisterContext.INSTANCE.setAvailable(false);
     }
 
@@ -102,6 +112,24 @@ private ExecuteContext buildContext() throws NoSuchMethodException {
         return context;
     }
 
+    private ExecuteContext buildContextRepeatedly() throws NoSuchMethodException {
+        scInstances.add(new DiscoveryServiceInstance(buildInstance(8001), serviceName));
+        scInstances.add(new DiscoveryServiceInstance(buildInstance(8002), serviceName));
+        scInstances.add(new DiscoveryServiceInstance(buildInstance(8003), serviceName));
+        scInstances.add(new DiscoveryServiceInstance(buildInstance(8004), serviceName));
+        scInstances.add(new DiscoveryServiceInstance(buildInstance(8005), serviceName));
+        originInstances.add(new ZookeeperServiceInstance(serviceName, buildZkInstance(8005)));
+        originInstances.add(new ZookeeperServiceInstance(serviceName, buildZkInstance(8006)));
+        originInstances.add(new ZookeeperServiceInstance(serviceName, buildZkInstance(8007)));
+        originInstances.add(new ZookeeperServiceInstance(serviceName, buildZkInstance(8008)));
+        allInstances.addAll(originInstances);
+        allInstances.addAll(scInstances);
+        final ExecuteContext context = ExecuteContext.forMemberMethod(this, String.class.getDeclaredMethod("trim"),
+                new Object[]{allInstances}, null, null);
+        context.changeResult(originInstances);
+        return context;
+    }
+
     /**
      * 构建实例
      *
@@ -111,9 +139,10 @@ private ExecuteContext buildContext() throws NoSuchMethodException {
     public org.apache.curator.x.discovery.ServiceInstance buildZkInstance(int port) {
         final org.apache.curator.x.discovery.ServiceInstance serviceInstance = Mockito
                 .mock(org.apache.curator.x.discovery.ServiceInstance.class);
+        Mockito.when(serviceInstance.getSslPort()).thenReturn(port);
         Mockito.when(serviceInstance.getPort()).thenReturn(port);
-        Mockito.when(serviceInstance.getAddress()).thenReturn("localhost");
-        Mockito.when(serviceInstance.buildUriSpec()).thenReturn("http://localhost:" + port);
+        Mockito.when(serviceInstance.getAddress()).thenReturn("127.0.0.1");
+        Mockito.when(serviceInstance.buildUriSpec()).thenReturn("http://127.0.0.1:" + port);
         return serviceInstance;
     }