diff --git a/project/src/main/java/com/sdm/project/dao/SimulationDemandMapper.java b/project/src/main/java/com/sdm/project/dao/SimulationDemandMapper.java
index 9b076087..dab862ce 100644
--- a/project/src/main/java/com/sdm/project/dao/SimulationDemandMapper.java
+++ b/project/src/main/java/com/sdm/project/dao/SimulationDemandMapper.java
@@ -47,4 +47,6 @@ public interface SimulationDemandMapper extends BaseMapper<SimulationDemand> {
 
     List<SpdmDemandVo> getDemandListWithCondition(@Param("req") DemandQryReq req);
 
+    List<SpdmDemandVo> getDemandListByProjectId(@Param("nodeId") String nodeId);
+
 }
diff --git a/project/src/main/java/com/sdm/project/service/impl/NodeServiceImpl.java b/project/src/main/java/com/sdm/project/service/impl/NodeServiceImpl.java
index 6da0d320..77e22234 100644
--- a/project/src/main/java/com/sdm/project/service/impl/NodeServiceImpl.java
+++ b/project/src/main/java/com/sdm/project/service/impl/NodeServiceImpl.java
@@ -328,6 +328,11 @@ public class NodeServiceImpl extends ServiceImpl<SimulationNodeMapper, Simulatio
                 TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
                 return SdmResponse.failed("操作节点失败，原因：删除节点时失败！");
             }
+            // 删除项目下所有的需求
+            if (!deleteDemand(deleteNodeIdList)) {
+                TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
+                return SdmResponse.failed("操作节点关联的需求失败，原因：删除节点关联的需求时失败！");
+            }
             SdmResponse response = deleteDirNew(deleteNodeIdList.get(0));
             if (ObjectUtils.isEmpty(response) || response.getCode() != ResultCode.SUCCESS.getCode()) {
                 log.error("删除id为{}的节点时，删除文件夹失败，原因为：{}", deleteNodeIdList.get(0),response.getMessage());
@@ -338,6 +343,33 @@ public class NodeServiceImpl extends ServiceImpl<SimulationNodeMapper, Simulatio
         return SdmResponse.success();
     }
 
+    private boolean deleteDemand(List<String> deleteNodeIdList) {
+        try {
+            String nodeId = deleteNodeIdList.get(0);
+            // 查询是否是项目类型节点，只有项目类型节点才去删除需求
+            SpdmNodeVo node = nodeMapper.getNodeById(nodeId);
+            if (ObjectUtils.isEmpty(node) || NodeTypeEnum.PROJECT.getValue().equals(node.getNodeType())) {
+                log.info("node为空或不为项目类型，不删除需求，node：{}",node);
+                return true;
+            }
+            log.info("开始删除项目下的需求");
+            List<SpdmDemandVo> demandList = demandMapper.getDemandListByProjectId(nodeId);
+            if (CollectionUtils.isEmpty(demandList)) {
+                log.info("项目：{}下未查询到关联的需求",node.getNodeName());
+                return true;
+            }
+            log.info("共查询到项目：{}下的{}条需求",node.getNodeName(),demandList.size());
+            List<String> demandIdList = demandList.stream().map(SpdmDemandVo::getUuid).toList();
+            demandMapper.deleteDemand(demandIdList);
+            demandMapper.deleteDemandMember(demandIdList);
+            demandMapper.deleteDemandExtra(demandIdList);
+        }catch (Exception ex) {
+            log.error("删除项目下关联的需求时发生异常：{}",ex.getMessage());
+            return false;
+        }
+        return true;
+    }
+
     // 删除文件夹
     public SdmResponse deleteDirNew(String uuid) {
         DelDirReq req = new DelDirReq();
diff --git a/project/src/main/resources/mapper/SimulationDemandMapper.xml b/project/src/main/resources/mapper/SimulationDemandMapper.xml
index d8856c78..0f2d4b03 100644
--- a/project/src/main/resources/mapper/SimulationDemandMapper.xml
+++ b/project/src/main/resources/mapper/SimulationDemandMapper.xml
@@ -223,4 +223,8 @@
         </if>
     </select>
 
+    <select id="getDemandListByProjectId" resultType="com.sdm.project.model.vo.SpdmDemandVo">
+        select * from simulation_demand where project_id = #{nodeId}
+    </select>
+
 </mapper>
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