diff --git a/mhd_oms/src/main/java/com/mhd/oms/application/service/businessDocumentOrder/BusinessDocumentOrderApplicationService.java b/mhd_oms/src/main/java/com/mhd/oms/application/service/businessDocumentOrder/BusinessDocumentOrderApplicationService.java
index b3e99f7f0..776b4b2b1 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/application/service/businessDocumentOrder/BusinessDocumentOrderApplicationService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/application/service/businessDocumentOrder/BusinessDocumentOrderApplicationService.java
@@ -147,6 +147,14 @@ public class BusinessDocumentOrderApplicationService {
     {
         return businessDocumentOrderDomainService.audit(businessAuditDTO);
     }
+
+    /**
+     * 业务单反审核
+     */
+    public Boolean cancelAudit(BusinessAuditDTO businessAuditDTO)
+    {
+        return businessDocumentOrderDomainService.cancelAudit(businessAuditDTO);
+    }
     public boolean execute(List<Long> ids) {
         return businessDocumentOrderDomainService.execute(ids);
     }
diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/repository/facade/IBusinessDocumentOrderService.java b/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/repository/facade/IBusinessDocumentOrderService.java
index 948412564..b638970e9 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/repository/facade/IBusinessDocumentOrderService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/repository/facade/IBusinessDocumentOrderService.java
@@ -49,6 +49,11 @@ public interface IBusinessDocumentOrderService extends IService<BusinessDocument
 
     public Boolean audit( List<Long> ids, Long reviewStatus, String SalesManager,String reviewOpinion);
 
+    /**
+     * 业务单反审核（将已审核订单恢复到待审核）
+     */
+    public Boolean cancelAudit(List<Long> ids);
+
     String selectByMakerCodeNc(String salesmanCodeNc);
 
     String selectByMakerCodeNc1(String salesmanCodeNc);
diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/repository/persistence/BusinessDocumentOrderImpl.java b/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/repository/persistence/BusinessDocumentOrderImpl.java
index 9d4ee46ea..44f7ac880 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/repository/persistence/BusinessDocumentOrderImpl.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/repository/persistence/BusinessDocumentOrderImpl.java
@@ -5,6 +5,7 @@ import cn.hutool.core.util.ObjectUtil;
 import cn.hutool.core.util.RandomUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.mhd.common.core.domain.po.UserPo;
 import com.mhd.common.core.utils.OrderSequence;
@@ -298,6 +299,88 @@ public class BusinessDocumentOrderImpl extends ServiceImpl<BusinessDocumentOrder
         return null;
     }
 
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public Boolean cancelAudit(List<Long> ids) { // 取消审核 后端暂时未加鉴权
+        if (CollectionUtils.isEmpty(ids)) {
+            throw new ServiceException("未选择反审核的业务单");
+        }
+        for (Long id : ids) {
+            BusinessDocumentOrder order = businessDocumentOrderMapper.selectById(id);
+            if (ObjectUtil.isNull(order)) {
+                throw new ServiceException("未查询到业务单信息");
+            }
+            // 校验1：子单(splicingOrderType=3)不允许单独反审核，需对主单操作
+            if (order.getSplicingOrderType() != null && order.getSplicingOrderType() == 3L) {
+                throw new ServiceException("业务单【" + order.getGoodsNumber() + "】为子单，请对主单进行反审核");
+            }
+            // 校验2：仅"审核通过(reviewStatus=1)"可反审核
+            if (order.getReviewStatus() == null || order.getReviewStatus() != 1L) {
+                throw new ServiceException("业务单【" + order.getGoodsNumber() + "】非已审核状态，无法反审核");
+            }
+            // 校验3：已生成执行单的不允许反审核，需先取消执行
+            ExecuteOrder existExec = executeOrderMapper.selectOne(new LambdaQueryWrapper<ExecuteOrder>()
+                    .eq(ExecuteOrder::getBusinessDocumentId, id)
+                    .eq(ExecuteOrder::getDelFlag, 1).last("LIMIT 1"));
+            if (ObjectUtil.isNotNull(existExec)) {
+                throw new ServiceException("业务单【" + order.getGoodsNumber() + "】已生成执行单，请先取消执行");
+            }
+
+            boolean isMain = order.getSplicingOrderType() != null && order.getSplicingOrderType() == 4L;
+            // 拆单主单(isMain)：清理审核时生成的子单、子单地址、以及回填到配送明细的 subOrderId
+            if (isMain) {
+                List<BusinessDocumentOrder> subOrders = businessDocumentOrderMapper.selectList(
+                        new LambdaQueryWrapper<BusinessDocumentOrder>()
+                                .eq(BusinessDocumentOrder::getMainOrderId, String.valueOf(id))
+                                .eq(BusinessDocumentOrder::getDelFlag, 1));
+                if (subOrders != null && !subOrders.isEmpty()) {
+                    List<String> subIdStrs = new ArrayList<>();
+                    for (BusinessDocumentOrder sub : subOrders) {
+                        // 校验4：子单若已生成执行单，主单不可反审核
+                        ExecuteOrder subExec = executeOrderMapper.selectOne(new LambdaQueryWrapper<ExecuteOrder>()
+                                .eq(ExecuteOrder::getBusinessDocumentId, sub.getId())
+                                .eq(ExecuteOrder::getDelFlag, 1).last("LIMIT 1"));
+                        if (ObjectUtil.isNotNull(subExec)) {
+                            throw new ServiceException("子单【" + sub.getGoodsNumber() + "】已生成执行单，无法反审核主单");
+                        }
+                        subIdStrs.add(String.valueOf(sub.getId()));
+                        // 逻辑删除子单(与 delete() 方法一致：delFlag 2)
+                        sub.setDelFlag(2);
+                        businessDocumentOrderMapper.updateById(sub);
+                    }
+                    // 逻辑删除子单的地址(审核时按 orderId=子单id 生成)
+                    businessDocumentAddressMultiMapper.update(null,
+                            new LambdaUpdateWrapper<BusinessDocumentAddressMulti>()
+                                    .in(BusinessDocumentAddressMulti::getOrderId, subIdStrs)
+                                    .set(BusinessDocumentAddressMulti::getDelFlag, 2));
+                    // 清空审核时回填到 business_delivery_details_link.sub_order_id 的子单id
+                    businessDeliveryDetailsLinkMapper.update(null,
+                            new LambdaUpdateWrapper<BusinessDeliveryDetailsLink>()
+                                    .eq(BusinessDeliveryDetailsLink::getOrderId, id)
+                                    .isNotNull(BusinessDeliveryDetailsLink::getSubOrderId)
+                                    .set(BusinessDeliveryDetailsLink::getSubOrderId, null));
+                }
+            }
+
+            // 状态复位 + 清空审核信息(用 UpdateWrapper.set 确保 null 能写入；updateById 默认不更新 null)
+            LambdaUpdateWrapper<BusinessDocumentOrder> updateWrapper = new LambdaUpdateWrapper<BusinessDocumentOrder>()
+                    .eq(BusinessDocumentOrder::getId, id)
+                    .set(BusinessDocumentOrder::getReviewStatus, 0L)     // 未审核
+                    .set(BusinessDocumentOrder::getOrderStatus, 0L)      // 待审核
+                    .set(BusinessDocumentOrder::getExecuteStatus, 0L)    // 无状态
+                    .set(BusinessDocumentOrder::getReviewId, null)
+                    .set(BusinessDocumentOrder::getReview, null)
+                    .set(BusinessDocumentOrder::getReviewTime, null)
+                    .set(BusinessDocumentOrder::getReviewOpinion, null)
+                    .set(BusinessDocumentOrder::getSalesManager, null);
+            if (isMain) {
+                updateWrapper.set(BusinessDocumentOrder::getDeliveryProgress, null); // 清空主单拆单数
+            }
+            businessDocumentOrderMapper.update(null, updateWrapper);
+        }
+        return true;
+    }
+
     @Override
     @Transactional(rollbackFor = Exception.class)
     public Boolean execute(List<Long> ids) {
diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/service/BusinessDocumentOrderDomainService.java b/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/service/BusinessDocumentOrderDomainService.java
index 93585eeb6..385e3c3f9 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/service/BusinessDocumentOrderDomainService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/businessDocumentOrder/service/BusinessDocumentOrderDomainService.java
@@ -932,6 +932,15 @@ public class BusinessDocumentOrderDomainService {
 
         return businessDocumentOrderService.audit(businessAuditDTO.getIds(),businessAuditDTO.getReviewStatus(),businessAuditDTO.getSalesManager(),businessAuditDTO.getReviewOpinion());
     }
+
+    /**
+     * 业务单反审核
+     */
+    public Boolean cancelAudit(BusinessAuditDTO businessAuditDTO)
+    {
+        return businessDocumentOrderService.cancelAudit(businessAuditDTO.getIds());
+    }
+
     public Boolean execute(List<Long> ids) {
         return businessDocumentOrderService.execute(ids);
     }
diff --git a/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/businessDocumentOrder/BusinessDocumentOrderApi.java b/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/businessDocumentOrder/BusinessDocumentOrderApi.java
index eb5c6df23..abce60fdb 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/businessDocumentOrder/BusinessDocumentOrderApi.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/businessDocumentOrder/BusinessDocumentOrderApi.java
@@ -108,6 +108,16 @@ public class BusinessDocumentOrderApi extends BaseController{
         return AjaxResult.success(businessDocumentOrderApplicationService.audit(businessAuditDTO));
     }
 
+    /**
+     * 业务单反审核（将已审核订单恢复到待审核，便于修改）
+     */
+    @ApiOperation("业务单反审核")
+    @PostMapping(value = "/cancelAudit")
+    public AjaxResult cancelAudit(@RequestBody BusinessAuditDTO businessAuditDTO)
+    {
+        return toAjax(businessDocumentOrderApplicationService.cancelAudit(businessAuditDTO));
+    }
+
     /**
      * 批量执行【业务单】
      */