diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/repository/mapper/ReserveStockInOrderMapper.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/repository/mapper/ReserveStockInOrderMapper.java
index 92e0c7292..c1e48bbbc 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/repository/mapper/ReserveStockInOrderMapper.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/repository/mapper/ReserveStockInOrderMapper.java
@@ -46,4 +46,6 @@ public interface ReserveStockInOrderMapper extends BaseMapper<ReserveStockInOrde
     List<ReserveInMaterialDetailPO> queryNoticePrintDetail(ReserveStockInOrderDO stockInOrderDO);
 
     public String getJsbz(@Param("id") Long id);
+
+    int countByOrderNumberPrefix(@Param("prefix") String prefix);
 }
\ No newline at end of file
diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/service/ReserveStockInOrderApplicationService.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/service/ReserveStockInOrderApplicationService.java
index a31ca9db3..a33be77fa 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/service/ReserveStockInOrderApplicationService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/service/ReserveStockInOrderApplicationService.java
@@ -2066,4 +2066,8 @@ public class ReserveStockInOrderApplicationService {
         // 3. 拼接结果
         return datePart + randomPart;
     }
+
+    public String generateReserveOrderNumber() {
+        return stockInOrderDomainService.generateReserveOrderNumber();
+    }
 }
\ No newline at end of file
diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/service/ReserveStockInOrderDomainService.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/service/ReserveStockInOrderDomainService.java
index d451559cf..3f581c5e6 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/service/ReserveStockInOrderDomainService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reserveStockInOrder/service/ReserveStockInOrderDomainService.java
@@ -973,4 +973,16 @@ public class ReserveStockInOrderDomainService {
         return stockInOrderService.queryNoticePrintDetail(stockInOrderDO);
     }
 
+    /**
+     * 生成入库预约单号
+     */
+    public String generateReserveOrderNumber() {
+        SimpleDateFormat sdf = new SimpleDateFormat("yyMMdd");
+        String datePart = sdf.format(new Date());
+        String prefix = "R" + datePart;
+        int todayCount = reservationStockInOrderMapper.countByOrderNumberPrefix(prefix);
+        String seq = String.format("%03d", todayCount + 1);
+        return prefix + seq;
+    }
+
 }
\ No newline at end of file
diff --git a/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/reserveStockInOrder/ReserveStockInOrderApi.java b/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/reserveStockInOrder/ReserveStockInOrderApi.java
index 6e455959e..5a033c040 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/reserveStockInOrder/ReserveStockInOrderApi.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/interfaces/facade/reserveStockInOrder/ReserveStockInOrderApi.java
@@ -256,4 +256,13 @@ public class ReserveStockInOrderApi extends BaseController {
         }
     }
 
+    /**
+     * 生成入库预约单号
+     */
+    @ApiOperation("生成入库预约单号")
+    @GetMapping("/generateOrderNumber")
+    public AjaxResult generateOrderNumber() {
+        return AjaxResult.success(stockInOrderApplicationService.generateReserveOrderNumber());
+    }
+
 }
\ No newline at end of file
diff --git a/mhd_oms/src/main/resources/mapper/reserveStockInOrder/ReserveStockInOrderMapper.xml b/mhd_oms/src/main/resources/mapper/reserveStockInOrder/ReserveStockInOrderMapper.xml
index 7546d26e8..9ad6f89b9 100644
--- a/mhd_oms/src/main/resources/mapper/reserveStockInOrder/ReserveStockInOrderMapper.xml
+++ b/mhd_oms/src/main/resources/mapper/reserveStockInOrder/ReserveStockInOrderMapper.xml
@@ -777,4 +777,10 @@
           AND USER_ID = #{id} limit 1
     </select>
 
+    <select id="countByOrderNumberPrefix" resultType="java.lang.Integer" parameterType="java.lang.String">
+        SELECT COUNT(1)
+        FROM reserve_stock_in_order
+        WHERE in_order_number LIKE concat(#{prefix}, '%')
+    </select>
+
 </mapper>
\ No newline at end of file