diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/repository/mapper/ReserveStockOutOrderMapper.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/repository/mapper/ReserveStockOutOrderMapper.java
index e752dc596..cacc94153 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/repository/mapper/ReserveStockOutOrderMapper.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/repository/mapper/ReserveStockOutOrderMapper.java
@@ -6,6 +6,7 @@ import com.mhd.oms.domain.reserveOutMaterialDetail.repository.po.ReserveOutMater
 import com.mhd.oms.domain.reserveStockOutOrder.entity.ReserveStockOutOrder;
 import com.mhd.oms.domain.reserveStockOutOrder.repository.po.ReserveStockOutOrderPO;
 import com.mhd.oms.domain.reserveStockOutOrder.repository.todo.ReserveStockOutOrderDO;
+import org.apache.ibatis.annotations.Param;
 
 import java.util.List;
 
@@ -33,4 +34,6 @@ public interface ReserveStockOutOrderMapper extends BaseMapper<ReserveStockOutOr
      * 出库单提货单打印-明细
      */
     List<ReserveOutMaterialDetailPO> queryOutStockNoticePrintDetail(ReserveStockOutOrderDO stockOutOrderDO);
+
+    int countByOrderNumberPrefix(@Param("prefix") String prefix);
 }
\ No newline at end of file
diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/service/ReserveStockOutOrderApplicationService.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/service/ReserveStockOutOrderApplicationService.java
index 95cdd6c2f..13f113cda 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/service/ReserveStockOutOrderApplicationService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/service/ReserveStockOutOrderApplicationService.java
@@ -1217,4 +1217,8 @@ public class ReserveStockOutOrderApplicationService {
         // 3. 拼接结果
         return datePart + randomPart;
     }
+
+    public String generateReserveOrderNumber() {
+        return stockOutOrderDomainService.generateReserveOrderNumber();
+    }
 }
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diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/service/ReserveStockOutOrderDomainService.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/service/ReserveStockOutOrderDomainService.java
index 6e66b54d2..e261ee1b7 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/service/ReserveStockOutOrderDomainService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockOutOrder/service/ReserveStockOutOrderDomainService.java
@@ -28,6 +28,7 @@ import com.mhd.oms.domain.reserveStockInOrder.repository.mapper.ReserveStockInOr
 import com.mhd.oms.domain.reserveStockInOrder.repository.todo.ReserveStockInOrderDO;
 import com.mhd.oms.domain.reserveStockOutOrder.entity.ReserveStockOutOrder;
 import com.mhd.oms.domain.reserveStockOutOrder.repository.facade.IReserveStockOutOrderService;
+import com.mhd.oms.domain.reserveStockOutOrder.repository.mapper.ReserveStockOutOrderMapper;
 import com.mhd.oms.domain.reserveStockOutOrder.repository.po.ReserveStockOutOrderPO;
 import com.mhd.oms.domain.reserveStockOutOrder.repository.todo.ReserveStockOutOrderDO;
 import com.mhd.system.api.SystemServiceFeign;
@@ -71,6 +72,9 @@ public class ReserveStockOutOrderDomainService {
     @Autowired
     private ReserveStockInOrderMapper reservationStockInOrderMapper;
 
+    @Autowired
+    private ReserveStockOutOrderMapper stockOutOrderMapper;
+
     /**
      * 分页查询出库单列表
      */
@@ -751,4 +755,17 @@ public class ReserveStockOutOrderDomainService {
         return stockOutOrderService.queryOutStockNoticePrintDetail(stockOutOrderDO);
     }
 
+    /**
+     * 生成出库预约单号：C + YYMMDD + 当日累加序号（3位，不足补零）
+     * 当日累加 = 今日已有单数 + 1
+     */
+    public String generateReserveOrderNumber() {
+        SimpleDateFormat sdf = new SimpleDateFormat("yyMMdd");
+        String datePart = sdf.format(new Date());
+        String prefix = "C" + datePart;
+        int todayCount = stockOutOrderMapper.countByOrderNumberPrefix(prefix);
+        String seq = String.format("%03d", todayCount + 1);
+        return prefix + seq;
+    }
+
 }
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diff --git a/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/ReserveStockOutOrder/ReserveStockOutOrderApi.java b/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/ReserveStockOutOrder/ReserveStockOutOrderApi.java
index 7a034b4de..d01f422a0 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/ReserveStockOutOrder/ReserveStockOutOrderApi.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/ReserveStockOutOrder/ReserveStockOutOrderApi.java
@@ -294,4 +294,13 @@ public class ReserveStockOutOrderApi extends BaseController {
         }
     }
 
+    /**
+     * 生成出库预约单号
+     */
+    @ApiOperation("生成出库预约单号")
+    @GetMapping("/generateOrderNumber")
+    public AjaxResult generateOrderNumber() {
+        return AjaxResult.success(stockOutOrderApplicationService.generateReserveOrderNumber());
+    }
+
 }
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diff --git a/mhd_oms/src/main/resources/mapper/reserveStockOutOrder/ReserveStockOutOrderMapper.xml b/mhd_oms/src/main/resources/mapper/reserveStockOutOrder/ReserveStockOutOrderMapper.xml
index 05fa3137e..d8807c9d5 100644
--- a/mhd_oms/src/main/resources/mapper/reserveStockOutOrder/ReserveStockOutOrderMapper.xml
+++ b/mhd_oms/src/main/resources/mapper/reserveStockOutOrder/ReserveStockOutOrderMapper.xml
@@ -517,4 +517,10 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         <result property="boxPalletNo" column="box_pallet_no"/>
     </resultMap>
 
+    <select id="countByOrderNumberPrefix" resultType="java.lang.Integer" parameterType="java.lang.String">
+        SELECT COUNT(1)
+        FROM reserve_stock_out_order
+        WHERE out_order_number LIKE concat(#{prefix}, '%')
+    </select>
+
 </mapper>
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