diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockInOrder/repository/mapper/ReservationStockInOrderMapper.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockInOrder/repository/mapper/ReservationStockInOrderMapper.java
index 8f6078a99..2d23240eb 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockInOrder/repository/mapper/ReservationStockInOrderMapper.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockInOrder/repository/mapper/ReservationStockInOrderMapper.java
@@ -77,4 +77,6 @@ public interface ReservationStockInOrderMapper extends BaseMapper<ReservationSto
     List<String> generateReserveOrderNumber1(@Param("prefix") String prefix);
 
     int existsByOrderNumber(@Param("inOrderNumber") String inOrderNumber);
+
+    int existsByBusinessOrderNo(@Param("businessOrderNo") String businessOrderNo);
 }
\ No newline at end of file
diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockInOrder/repository/persistence/ReservationStockInOrderImpl.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockInOrder/repository/persistence/ReservationStockInOrderImpl.java
index 26d21686d..5116ef9b0 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockInOrder/repository/persistence/ReservationStockInOrderImpl.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockInOrder/repository/persistence/ReservationStockInOrderImpl.java
@@ -486,25 +486,17 @@ public class ReservationStockInOrderImpl extends ServiceImpl<ReservationStockInO
         }
         ReservationStockInOrderDO reservationStockInOrderDO = new ReservationStockInOrderDO();
         StockInHeader stockInHeader = resultDTO.getStockInHeader();
-        // 业务单号：优先使用模板自带OrderNO，与系统已有入库业务单号重复时提示；
-        // 模板未填单号时按 R+年月日+当日累加 规则生成（如R260717001、R260717002）
+        // 业务单号：优先使用模板自带OrderNO（不做格式规则校验），与系统已有业务单号重复时提示不允许导入；
+        // 入库业务单号(in_order_number)不使用模板单号，统一由系统原本逻辑生成（见insertDomain）；
+        // 模板未填单号时保持系统逻辑：业务单号默认=入库业务单号
         String templateOrderNo = stockInHeader.getOrderNo() == null ? "" : stockInHeader.getOrderNo().trim();
         if (!templateOrderNo.isEmpty()) {
-            // 先校验模板单号是否符合规则：R+年月日+3位及以上序号，如R260717001
-            validateTemplateOrderNo(templateOrderNo);
-            // 跨两张入库单表查重（与手工新增取号逻辑保持一致）
-            // 注意：本类字段命名易混淆——stockInOrderMapper为reservation表，reservationStockInOrderMapper为reserve表
-            boolean duplicated = stockInOrderMapper.existsByOrderNumber(templateOrderNo) > 0
-                    || reservationStockInOrderMapper.countByInOrderNumber(templateOrderNo) > 0;
-            if (duplicated) {
-                throw new ServiceException("入库业务单号已存在：" + templateOrderNo + "，请修改模板中的OrderNO后重新导入");
+            // 按业务单号查重（入库业务单表 business_order_no 字段）
+            if (stockInOrderMapper.existsByBusinessOrderNo(templateOrderNo) > 0) {
+                throw new ServiceException("业务单号已存在：" + templateOrderNo + "，请修改模板中的OrderNO后重新导入");
             }
+            reservationStockInOrderDO.setBusinessOrderNo(templateOrderNo);
         }
-        if (templateOrderNo.isEmpty()) {
-            templateOrderNo = reservationStockInOrderDomainService.generateReserveOrderNumber();
-        }
-        reservationStockInOrderDO.setInOrderNumber(templateOrderNo);
-        reservationStockInOrderDO.setBusinessOrderNo(templateOrderNo);
         reservationStockInOrderDO.setOrganizationId(loginUser.getUserPo().getOrganizationId());
         reservationStockInOrderDO.setOrganizationName(loginUser.getUserPo().getOrganizationName());
         reservationStockInOrderDO.setTopOrganizationId(loginUser.getUserPo().getTopOrganizationId());
@@ -597,25 +589,6 @@ public class ReservationStockInOrderImpl extends ServiceImpl<ReservationStockInO
     }
 
 
-    /**
-     * 校验模板自带业务单号是否符合规则：R + 年月日(yyMMdd) + 3位及以上序号
-     * 示例：R260717001、R260717002
-     * 格式不符或年月日部分非有效日期（如R261332001）时抛出提示
-     */
-    private void validateTemplateOrderNo(String orderNo) {
-        // R + 6位年月日 + 至少3位数字序号
-        if (!orderNo.matches("R\\d{9,}")) {
-            throw new ServiceException("入库业务单号格式不正确：正确格式为R+年月日+3位序号，如R260717001");
-        }
-        try {
-            SimpleDateFormat fmt = new SimpleDateFormat("yyMMdd");
-            fmt.setLenient(false);
-            fmt.parse(orderNo.substring(1, 7));
-        } catch (java.text.ParseException e) {
-            throw new ServiceException("入库业务单号格式不正确：正确格式为R+年月日+3位序号，如R260717001");
-        }
-    }
-
     @Transactional(rollbackFor = Exception.class)
     public Boolean insertDomain(ReservationStockInOrderDO stockInOrderDO) {
         // 仓库信息校验（保留原有行为：仓库信息获取失败直接报错）
@@ -624,12 +597,16 @@ public class ReservationStockInOrderImpl extends ServiceImpl<ReservationStockInO
         if (!"200".equals(String.valueOf(ajaxResult.get("code")))) {
             throw new ServiceException("获取仓库信息失败");
         }
-        // 入库单号：调用方已设置（如导入时优先使用模板自带OrderNO，且已校验不重复）则沿用，不再覆盖；
-        // 未设置时按 R+年月日+当日累加 规则生成（如R260717001、R260717002），跨reservation/reserve两表取号防撞
+        // 入库单号：调用方未设置时按 R+年月日+当日累加 规则生成（如R260717001、R260717002），
+        // 跨reservation/reserve两表取号防撞；导入时不再使用模板OrderNO作为入库单号（模板单号只作业务单号）
         if (stockInOrderDO.getInOrderNumber() == null || stockInOrderDO.getInOrderNumber().trim().isEmpty()) {
             stockInOrderDO.setInOrderNumber(reservationStockInOrderDomainService.generateReserveOrderNumber());
         }
-        stockInOrderDO.setBusinessOrderNo(stockInOrderDO.getInOrderNumber());
+        // 业务单号：未设置时默认=入库单号（模板未填OrderNO的导入及常规场景）；
+        // 导入且模板带OrderNO时由调用方已设置，此处沿用不覆盖
+        if (stockInOrderDO.getBusinessOrderNo() == null || stockInOrderDO.getBusinessOrderNo().trim().isEmpty()) {
+            stockInOrderDO.setBusinessOrderNo(stockInOrderDO.getInOrderNumber());
+        }
         //统计总计划数
         BigDecimal quantity =  stockInOrderDO.getMaterialDetailList().stream().map(ReservationInMaterialDetailDO::getQuantity).filter(Objects::nonNull).reduce(BigDecimal.ZERO, BigDecimal::add);
         stockInOrderDO.setQuantity(quantity);
diff --git a/mhd_oms/src/main/resources/mapper/reservationStockInOrder/ReservationStockInOrderMapper.xml b/mhd_oms/src/main/resources/mapper/reservationStockInOrder/ReservationStockInOrderMapper.xml
index 8d7578d06..19c04380f 100644
--- a/mhd_oms/src/main/resources/mapper/reservationStockInOrder/ReservationStockInOrderMapper.xml
+++ b/mhd_oms/src/main/resources/mapper/reservationStockInOrder/ReservationStockInOrderMapper.xml
@@ -688,4 +688,9 @@
     <select id="existsByOrderNumber" resultType="java.lang.Integer" parameterType="java.lang.String">
         SELECT COUNT(1) FROM reservation_stock_in_order WHERE in_order_number = #{inOrderNumber}
     </select>
+
+    <!-- 导入模板自带OrderNO按业务单号查重 -->
+    <select id="existsByBusinessOrderNo" resultType="java.lang.Integer" parameterType="java.lang.String">
+        SELECT COUNT(1) FROM reservation_stock_in_order WHERE business_order_no = #{businessOrderNo}
+    </select>
 </mapper>
\ No newline at end of file