diff --git a/backend/src/main/java/io/metersphere/api/service/ApiAutomationService.java b/backend/src/main/java/io/metersphere/api/service/ApiAutomationService.java
index 789c30ee7e..777bea6712 100644
--- a/backend/src/main/java/io/metersphere/api/service/ApiAutomationService.java
+++ b/backend/src/main/java/io/metersphere/api/service/ApiAutomationService.java
@@ -3043,4 +3043,8 @@ public class ApiAutomationService {
         List<ApiScenarioFollow> follows = apiScenarioFollowMapper.selectByExample(example);
         return follows.stream().map(ApiScenarioFollow::getFollowId).distinct().collect(Collectors.toList());
     }
+
+    public void setScenarioEnvGroupIdNull(String envGroupId) {
+        extApiScenarioMapper.setScenarioEnvGroupIdNull(envGroupId);
+    }
 }
diff --git a/backend/src/main/java/io/metersphere/base/mapper/ext/ExtApiScenarioMapper.java b/backend/src/main/java/io/metersphere/base/mapper/ext/ExtApiScenarioMapper.java
index 6bf78568d5..55dc0a846c 100644
--- a/backend/src/main/java/io/metersphere/base/mapper/ext/ExtApiScenarioMapper.java
+++ b/backend/src/main/java/io/metersphere/base/mapper/ext/ExtApiScenarioMapper.java
@@ -85,4 +85,6 @@ public interface ExtApiScenarioMapper {
 
     List<RelationshipGraphData.Node> getTestCaseForGraph(@Param("ids") Set<String> ids);
 
+    void setScenarioEnvGroupIdNull(@Param("environmentGroupId") String environmentGroupId);
+
 }
diff --git a/backend/src/main/java/io/metersphere/base/mapper/ext/ExtApiScenarioMapper.xml b/backend/src/main/java/io/metersphere/base/mapper/ext/ExtApiScenarioMapper.xml
index 9677f8bd45..4809a3b305 100644
--- a/backend/src/main/java/io/metersphere/base/mapper/ext/ExtApiScenarioMapper.xml
+++ b/backend/src/main/java/io/metersphere/base/mapper/ext/ExtApiScenarioMapper.xml
@@ -389,6 +389,9 @@
     <update id="updateCustomNumByProjectId">
         update api_scenario set custom_num = num where (custom_num is null or custom_num = '') and project_id = #{projectId}
     </update>
+    <update id="setScenarioEnvGroupIdNull">
+        update api_scenario set environment_group_id = null where environment_group_id = #{environmentGroupId}
+    </update>
 
     <select id="countByProjectID" resultType="java.lang.Long">
         SELECT COUNT(id) AS countNumber FROM api_scenario WHERE project_id = #{0} AND status != 'Trash'
diff --git a/backend/src/main/java/io/metersphere/service/EnvironmentGroupService.java b/backend/src/main/java/io/metersphere/service/EnvironmentGroupService.java
index ff0bb16ae2..1146823d0d 100644
--- a/backend/src/main/java/io/metersphere/service/EnvironmentGroupService.java
+++ b/backend/src/main/java/io/metersphere/service/EnvironmentGroupService.java
@@ -1,5 +1,6 @@
 package io.metersphere.service;
 
+import io.metersphere.api.service.ApiAutomationService;
 import io.metersphere.base.domain.*;
 import io.metersphere.base.mapper.ApiTestEnvironmentMapper;
 import io.metersphere.base.mapper.EnvironmentGroupMapper;
@@ -43,6 +44,8 @@ public class EnvironmentGroupService {
     private ProjectMapper projectMapper;
     @Resource
     private ApiTestEnvironmentMapper apiTestEnvironmentMapper;
+    @Resource
+    private ApiAutomationService apiAutomationService;
 
     public EnvironmentGroup add(EnvironmentGroupRequest request) {
         request.setWorkspaceId(SessionUtils.getCurrentWorkspaceId());
@@ -93,6 +96,7 @@ public class EnvironmentGroupService {
             return;
         }
         environmentGroupMapper.deleteByPrimaryKey(id);
+        apiAutomationService.setScenarioEnvGroupIdNull(id);
         EnvironmentGroupProjectExample example = new EnvironmentGroupProjectExample();
         example.createCriteria().andEnvironmentGroupIdEqualTo(id);
         environmentGroupProjectMapper.deleteByExample(example);