diff --git a/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/AlertPluginInstanceServiceTest.java b/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/AlertPluginInstanceServiceTest.java
new file mode 100644
index 0000000000..1801794556
--- /dev/null
+++ b/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/AlertPluginInstanceServiceTest.java
@@ -0,0 +1,99 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.api.service;
+
+import org.apache.dolphinscheduler.api.enums.Status;
+import org.apache.dolphinscheduler.api.service.impl.AlertPluginInstanceServiceImpl;
+import org.apache.dolphinscheduler.common.Constants;
+import org.apache.dolphinscheduler.common.enums.UserType;
+import org.apache.dolphinscheduler.dao.entity.AlertPluginInstance;
+import org.apache.dolphinscheduler.dao.entity.User;
+import org.apache.dolphinscheduler.dao.mapper.AlertGroupMapper;
+import org.apache.dolphinscheduler.dao.mapper.AlertPluginInstanceMapper;
+import org.apache.dolphinscheduler.dao.mapper.PluginDefineMapper;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.junit.MockitoJUnitRunner;
+
+@RunWith(MockitoJUnitRunner.class)
+public class AlertPluginInstanceServiceTest {
+
+    @InjectMocks
+    AlertPluginInstanceServiceImpl alertPluginInstanceService;
+
+    @Mock
+    private AlertPluginInstanceMapper alertPluginInstanceMapper;
+
+    @Mock
+    private PluginDefineMapper pluginDefineMapper;
+
+    @Mock
+    private AlertGroupMapper alertGroupMapper;
+
+    private List<AlertPluginInstance> alertPluginInstances;
+
+    private User user;
+
+    @Before
+    public void before() {
+        user = new User();
+        user.setUserType(UserType.ADMIN_USER);
+        user.setId(1);
+        AlertPluginInstance alertPluginInstance = new AlertPluginInstance();
+        alertPluginInstance.setPluginInstanceParams("test1");
+        alertPluginInstance.setPluginDefineId(1);
+        alertPluginInstance.setId(1);
+        alertPluginInstance.setPluginInstanceParams("test");
+        alertPluginInstances = new ArrayList<>();
+        alertPluginInstances.add(alertPluginInstance);
+    }
+
+    @Test
+    public void testCreate() {
+        Mockito.when(alertPluginInstanceMapper.queryByInstanceName("test")).thenReturn(alertPluginInstances);
+        Map<String, Object> result = alertPluginInstanceService.create(user, 1, "test", "test params");
+        Assert.assertEquals(result.get(Constants.STATUS), Status.PLUGIN_INSTANCE_ALREADY_EXIT);
+        Mockito.when(alertPluginInstanceMapper.insert(Mockito.any())).thenReturn(1);
+        result = alertPluginInstanceService.create(user, 1, "test1", "test params");
+        Assert.assertEquals(result.get(Constants.STATUS), Status.SUCCESS);
+    }
+
+    @Test
+   public void testDelete() {
+        List<String> ids = Arrays.asList("11,2,3",null,"98,1");
+        Mockito.when(alertGroupMapper.queryInstanceIdsList()).thenReturn(ids);
+        Map<String, Object> result= alertPluginInstanceService.delete(user, 1);
+        Assert.assertEquals(result.get(Constants.STATUS), Status.DELETE_ALERT_PLUGIN_INSTANCE_ERROR_HAS_ALERT_GROUP_ASSOCIATED);
+        Mockito.when(alertPluginInstanceMapper.deleteById(9)).thenReturn(1);
+        result= alertPluginInstanceService.delete(user, 9);
+        Assert.assertEquals(result.get(Constants.STATUS), Status.SUCCESS);
+
+    }
+
+}
diff --git a/pom.xml b/pom.xml
index 35ffa58274..214138d9c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -787,6 +787,7 @@
                         <include>**/api/service/BaseDAGServiceTest.java</include>
                         <include>**/api/service/BaseServiceTest.java</include>
                         <include>**/api/service/DataAnalysisServiceTest.java</include>
+                        <include>**/api/service/AlertPluginInstanceServiceTest.java</include>
                         <include>**/api/service/DataSourceServiceTest.java</include>
                         <include>**/api/service/ExecutorService2Test.java</include>
                         <include>**/api/service/ExecutorServiceTest.java</include>