diff --git a/backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseDemandService.java b/backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseDemandService.java
index 26d1661084..d77640ddea 100644
--- a/backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseDemandService.java
+++ b/backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseDemandService.java
@@ -210,8 +210,9 @@ public class FunctionalCaseDemandService {
      * @param id 需求关系ID
      */
     public void deleteDemand(String id) {
+        FunctionalCaseDemand functionalCaseDemandInDb= functionalCaseDemandMapper.selectByPrimaryKey(id);
         FunctionalCaseDemandExample functionalCaseDemandExample = new FunctionalCaseDemandExample();
-        functionalCaseDemandExample.createCriteria().andParentEqualTo(id);
+        functionalCaseDemandExample.createCriteria().andParentEqualTo(functionalCaseDemandInDb.getDemandId());
         List<FunctionalCaseDemand> functionalCaseDemands = functionalCaseDemandMapper.selectByExample(functionalCaseDemandExample);
         if (CollectionUtils.isNotEmpty(functionalCaseDemands)) {
             SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH);