diff --git a/src/main/java/com/xujie/sys/modules/erf/service/ErfFlowEngineService.java b/src/main/java/com/xujie/sys/modules/erf/service/ErfFlowEngineService.java
index be3ad178..867f42a5 100644
--- a/src/main/java/com/xujie/sys/modules/erf/service/ErfFlowEngineService.java
+++ b/src/main/java/com/xujie/sys/modules/erf/service/ErfFlowEngineService.java
@@ -33,19 +33,13 @@ public interface ErfFlowEngineService {
     void startFlowWithApprovers(String applyNo, String buCode, Long creatorUserId, Map<String, Object> approverInfo);
 
     /**
-     * 重新启动流程（驳回后重新下达）
+     * 删除申请单的所有流程节点实例
      * 
-     * <p>与 startFlowWithApprovers 的区别：</p>
-     * <ul>
-     * <li>不创建新的流程实例（重用已有的）</li>
-     * <li>更新流程实例的审批人信息</li>
-     * <li>创建新的节点实例（attempt_no 递增）</li>
-     * </ul>
+     * <p>撤回操作时调用，清空节点记录，下次下达时重新创建</p>
      * 
      * @param applyNo 申请单号
-     * @param approverInfo 审批人信息（techManagerId, prodManagerIds, qualityManagerIds）
      */
-    void restartFlowWithApprovers(String applyNo, Map<String, Object> approverInfo);
+    void deleteFlowNodes(String applyNo);
 
     /**
      * 流转到下一个节点
diff --git a/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpApplyServiceImpl.java b/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpApplyServiceImpl.java
index a246158c..9715c51e 100644
--- a/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpApplyServiceImpl.java
+++ b/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpApplyServiceImpl.java
@@ -140,19 +140,9 @@ public class ErfExpApplyServiceImpl extends ServiceImpl<ErfExpApplyMapper, ErfEx
             throw new XJException("质量经理未指定");
         }
 
-        // 【修复漏洞】检查是否已存在流程实例，判断是首次下达还是重新下达
-        // 正确的判断方式：查询流程实例表，而不是只看申请单状态
-        // 因为撤回后状态也是"草稿"，但流程实例已经存在
-        QueryWrapper<ErfFlowInstance> flowQuery = new QueryWrapper<>();
-        flowQuery.eq("apply_no", data.getApplyNo());
-        ErfFlowInstance existingFlow = erfFlowInstanceMapper.selectOne(flowQuery);
-
-        boolean isFirstSubmit = (existingFlow == null);
-        String action = isFirstSubmit ? "首次下达" :
-                       ("已驳回".equals(entity.getStatus()) ? "驳回后重新下达" : "撤回后重新下达");
+        String action = "已驳回".equals(entity.getStatus()) ? "驳回后重新下达" : "下达";
 
-        log.info("申请单: {}, 流程实例存在: {}, 当前状态: {}, 操作: {}",
-            data.getApplyNo(), existingFlow != null, entity.getStatus(), action);
+        log.info("申请单: {}, 当前状态: {}, 操作: {}", data.getApplyNo(), entity.getStatus(), action);
 
         // 更新申请单状态（updateTime由MyBatis-Plus自动填充）
         entity.setStatus("已下达");
@@ -166,22 +156,13 @@ public class ErfExpApplyServiceImpl extends ServiceImpl<ErfExpApplyMapper, ErfEx
         approverInfo.put("prodManagerIds", data.getProdManagerIds());
         approverInfo.put("qualityManagerIds", data.getQualityManagerIds());
 
-        if (isFirstSubmit) {
-            // 首次下达：创建新的流程实例
-            log.info("首次下达，创建流程实例");
-            erfFlowEngineService.startFlowWithApprovers(
-                entity.getApplyNo(),
-                entity.getBuNo(),
-                entity.getCreatorUserId(),
-                approverInfo
-            );
-        } else {
-            // 重新下达（驳回后或撤回后）：重用已有流程实例，不创建新的
-            erfFlowEngineService.restartFlowWithApprovers(
-                entity.getApplyNo(),
-                approverInfo
-            );
-        }
+        // 无论首次还是重新下达，都新建节点（startFlowWithApprovers 内部会先删除旧节点）
+        erfFlowEngineService.startFlowWithApprovers(
+            entity.getApplyNo(),
+            entity.getBuNo(),
+            entity.getCreatorUserId(),
+            approverInfo
+        );
 
         // 记录操作日志 - 获取审批人用户名
         String techManagerName = getUserDisplayById(data.getTechManagerId());
@@ -333,6 +314,9 @@ public class ErfExpApplyServiceImpl extends ServiceImpl<ErfExpApplyMapper, ErfEx
         entity.setStatus("草稿");
         this.updateById(entity);
 
+        // 撤回时删除所有流程节点，下次下达时重新创建
+        erfFlowEngineService.deleteFlowNodes(applyNo);
+
         log.info("撤回工程实验申请单: {}", applyNo);
     }
 
diff --git a/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfFlowEngineServiceImpl.java b/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfFlowEngineServiceImpl.java
index ffdb04d6..60c07f2a 100644
--- a/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfFlowEngineServiceImpl.java
+++ b/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfFlowEngineServiceImpl.java
@@ -107,102 +107,61 @@ public class ErfFlowEngineServiceImpl implements ErfFlowEngineService {
         log.info("审批人信息 - 技术经理: {}, 生产经理: {}, 质量经理: {}",
             techManagerId, prodManagerIds, qualityManagerIds);
 
-        // 创建流程实例，保存审批人信息到remark字段
-        ErfFlowInstance flowInstance = new ErfFlowInstance();
-        flowInstance.setApplyNo(applyNo);
-        flowInstance.setFlowCode("EXP_APPLY_" + buCode);
-        flowInstance.setFlowVersion(1);
-        flowInstance.setStatus("运行中");
-        flowInstance.setStartTime(new Date());
-        flowInstance.setCurrentNodeCode("技术经理审批");
+        // 1. 删除该申请单已有的所有节点实例，确保每次下达都是全新的节点
+        deleteFlowNodes(applyNo);
 
-        // 将审批人信息序列化保存到remark字段（方便后续节点读取）
+        // 2. 将审批人信息序列化保存到remark字段（方便后续节点读取）
         String approverJson = String.format(
             "{\"techManagerId\":%d,\"prodManagerIds\":[%s],\"qualityManagerIds\":[%s]}",
             techManagerId,
             prodManagerIds.stream().map(String::valueOf).collect(Collectors.joining(",")),
             qualityManagerIds.stream().map(String::valueOf).collect(Collectors.joining(","))
         );
-        flowInstance.setRemark(approverJson);
-        erfFlowInstanceMapper.insert(flowInstance);
-
-        // 创建第一个审批节点实例（技术经理审批）
-        ErfFlowNodeInstance nodeInstance = new ErfFlowNodeInstance();
-        nodeInstance.setApplyNo(applyNo);
-        nodeInstance.setNodeCode("技术经理审批");
-        nodeInstance.setAttemptNo(1);
-        nodeInstance.setStatus("待审核");
-        nodeInstance.setReceiveTime(new Date());
-        nodeInstance.setAssigneeUserId(techManagerId);  // 使用传入的技术经理ID
-        // 根据审批人id查询审批人名称并设置到节点实例（冗余存储，方便查询和展示）
-        nodeInstance.setAssigneeName(sysUserDao.getUserDisplayById(techManagerId));
-        erfFlowNodeInstanceMapper.insert(nodeInstance);
-
-        log.info("流程启动成功，当前节点：技术经理审批，审批人ID：{}", techManagerId);
-    }
-
-    @Override
-    public void restartFlowWithApprovers(String applyNo, Map<String, Object> approverInfo) {
-        log.info("=== 重新启动流程（驳回后重新下达）=== 申请单号: {}", applyNo);
-
-        Long techManagerId = (Long) approverInfo.get("techManagerId");
-        @SuppressWarnings("unchecked")
-        List<Long> prodManagerIds = (List<Long>) approverInfo.get("prodManagerIds");
-        @SuppressWarnings("unchecked")
-        List<Long> qualityManagerIds = (List<Long>) approverInfo.get("qualityManagerIds");
-
-        log.info("审批人信息 - 技术经理: {}, 生产经理: {}, 质量经理: {}",
-            techManagerId, prodManagerIds, qualityManagerIds);
 
-        // 1. 查询已有的流程实例
+        // 3. 创建或更新流程实例
         QueryWrapper<ErfFlowInstance> flowQuery = new QueryWrapper<>();
         flowQuery.eq("apply_no", applyNo);
         ErfFlowInstance flowInstance = erfFlowInstanceMapper.selectOne(flowQuery);
-
+        boolean isNewInstance = (flowInstance == null);
         if (flowInstance == null) {
-            throw new XJException("流程实例不存在，无法重新下达");
+            flowInstance = new ErfFlowInstance();
+            flowInstance.setApplyNo(applyNo);
+            flowInstance.setFlowCode("EXP_APPLY_" + buCode);
+            flowInstance.setFlowVersion(1);
+            flowInstance.setStartTime(new Date());
         }
-
-        // 2. 更新流程实例的审批人信息和状态
         flowInstance.setStatus("运行中");
         flowInstance.setCurrentNodeCode("技术经理审批");
-
-        // 更新审批人信息到remark字段
-        String approverJson = String.format(
-            "{\"techManagerId\":%d,\"prodManagerIds\":[%s],\"qualityManagerIds\":[%s]}",
-            techManagerId,
-            prodManagerIds.stream().map(String::valueOf).collect(Collectors.joining(",")),
-            qualityManagerIds.stream().map(String::valueOf).collect(Collectors.joining(","))
-        );
         flowInstance.setRemark(approverJson);
-        erfFlowInstanceMapper.updateById(flowInstance);
-
-        log.info("更新流程实例，当前节点：技术经理审批");
 
-        // 3. 查询技术经理审批节点的最大attempt_no
-        QueryWrapper<ErfFlowNodeInstance> nodeQuery = new QueryWrapper<>();
-        nodeQuery.eq("apply_no", applyNo)
-                 .eq("node_code", "技术经理审批")
-                 .orderByDesc("attempt_no")
-                 .last("OFFSET 0 ROWS FETCH NEXT 1 ROWS ONLY");
-        ErfFlowNodeInstance lastInstance = erfFlowNodeInstanceMapper.selectOne(nodeQuery);
-
-        int nextAttemptNo = (lastInstance != null) ? lastInstance.getAttemptNo() + 1 : 1;
+        if (isNewInstance) {
+            erfFlowInstanceMapper.insert(flowInstance);
+            log.info("新建流程实例");
+        } else {
+            erfFlowInstanceMapper.updateById(flowInstance);
+            log.info("更新已有流程实例");
+        }
 
-        // 4. 创建新的技术经理审批节点实例（attempt_no递增）
+        // 4. 创建第一个审批节点实例（技术经理审批）
         ErfFlowNodeInstance nodeInstance = new ErfFlowNodeInstance();
         nodeInstance.setApplyNo(applyNo);
         nodeInstance.setNodeCode("技术经理审批");
-        nodeInstance.setAttemptNo(nextAttemptNo);
+        nodeInstance.setAttemptNo(1);
         nodeInstance.setStatus("待审核");
         nodeInstance.setReceiveTime(new Date());
-        nodeInstance.setAssigneeUserId(techManagerId);  // 使用新的技术经理ID
-        // 根据审批人id查询审批人名称并设置到节点实例（冗余存储，方便查询和展示）
+        nodeInstance.setAssigneeUserId(techManagerId);
         nodeInstance.setAssigneeName(sysUserDao.getUserDisplayById(techManagerId));
         erfFlowNodeInstanceMapper.insert(nodeInstance);
 
-        log.info("流程重新启动成功，当前节点：技术经理审批，尝试次数：{}，审批人ID：{}",
-                nextAttemptNo, techManagerId);
+        log.info("流程启动成功，当前节点：技术经理审批，审批人ID：{}", techManagerId);
+    }
+
+    @Override
+    public void deleteFlowNodes(String applyNo) {
+        int deletedCount = erfFlowNodeInstanceMapper.delete(
+            new QueryWrapper<ErfFlowNodeInstance>().eq("apply_no", applyNo)
+        );
+        log.info("删除申请单 {} 的流程节点实例，共 {} 条", applyNo, deletedCount);
     }
 
     @Override