diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/mapper/MasterOrderMapper.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/mapper/MasterOrderMapper.java
index 0b7862f..b279b73 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/mapper/MasterOrderMapper.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/mapper/MasterOrderMapper.java
@@ -1,7 +1,10 @@
 /** BladeX Commercial License Agreement */
 package org.springblade.transport.mapper;
 
+import com.baomidou.mybatisplus.annotation.InterceptorIgnore;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
 import org.springblade.transport.pojo.entity.MasterOrder;
 
 /**
@@ -10,4 +13,9 @@ import org.springblade.transport.pojo.entity.MasterOrder;
  * @author Chill
  */
 public interface MasterOrderMapper extends BaseMapper<MasterOrder> {
+
+	@InterceptorIgnore(tenantLine = "true")
+	@Select("SELECT COALESCE(MAX(CAST(SUBSTRING_INDEX(master_no, '-', -1) AS UNSIGNED)), 0) " +
+		"FROM blade_master_order WHERE master_no LIKE CONCAT(#{prefix}, '%')")
+	int selectMaxSerial(@Param("prefix") String prefix);
 }
diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/MasterOrderServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/MasterOrderServiceImpl.java
index 782c24b..e2b5196 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/MasterOrderServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/MasterOrderServiceImpl.java
@@ -517,5 +517,9 @@ public class MasterOrderServiceImpl extends BaseServiceImpl<MasterOrderMapper, M
 	private LocalDate date(Map<String, Object> values, String key) { String value = string(values, key); if (Func.isEmpty(value)) return null; try { return LocalDate.parse(value.substring(0, 10)); } catch (Exception exception) { throw new ServiceException("日期格式不正确"); } }
 	private String string(Map<String, Object> values, String key) { return string(values, key, null); }
 	private String string(Map<String, Object> values, String key, String fallback) { Object value = values.get(key); return value == null ? fallback : String.valueOf(value); }
-	private synchronized String nextCode() { String prefix = "DL-" + LocalDate.now().format(DateTimeFormatter.BASIC_ISO_DATE) + "-"; long count = count(new LambdaQueryWrapper<MasterOrder>().likeRight(MasterOrder::getMasterNo, prefix)); return prefix + String.format("%04d", count + 1); }
+	private synchronized String nextCode() {
+		String prefix = "DL-" + LocalDate.now().format(DateTimeFormatter.BASIC_ISO_DATE) + "-";
+		int serial = baseMapper.selectMaxSerial(prefix) + 1;
+		return prefix + String.format("%04d", serial);
+	}
 }