diff --git a/build-frontend.bat b/build-frontend.bat
index 439033e0..ea01a144 100644
--- a/build-frontend.bat
+++ b/build-frontend.bat
@@ -3,8 +3,10 @@ setlocal
 set REPO=%~dp0
 set WEBDIST=%REPO%web-dist
 
-echo [1/4] build frontend (pnpm build) ...
+echo [1/4] build frontend (pnpm install + build) ...
 cd /d %REPO%jeecgboot-vue3
+call pnpm install
+if errorlevel 1 ( echo [ERROR] pnpm install failed & pause & exit /b 1 )
 call pnpm run build
 if errorlevel 1 ( echo [ERROR] frontend build failed & pause & exit /b 1 )
 if not exist "%REPO%jeecgboot-vue3\dist\index.html" ( echo [ERROR] dist/index.html not found & pause & exit /b 1 )
diff --git a/jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/doc/代码修改日志 b/jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/doc/代码修改日志
index ae0c7f64..88ba16f6 100644
--- a/jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/doc/代码修改日志
+++ b/jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/doc/代码修改日志
@@ -1092,3 +1092,9 @@ jeecgboot-vue3/src/views/xslmes/mesXslEquipDowntimeRecord/MesXslEquipDowntimeRec
 jeecgboot-vue3/src/views/xslmes/mesXslEquipDowntimeRecord/MesXslEquipDowntimeRecord.data.ts
 jeecgboot-vue3/src/views/xslmes/mesXslEquipDowntimeRecord/MesXslEquipDowntimeRecordList.vue
 jeecgboot-vue3/src/views/xslmes/mesXslEquipDowntimeRecord/components/MesXslEquipDowntimeRecordModal.vue
+
+-- author:GHT---date:20260616--for: 【MES上辅机】生产环境 SQL Server 中间库连接池校验 DUAL 报错修复 ---
+原因：application-prod.yml 全局 druid.validationQuery 为 SELECT 1 FROM DUAL，动态创建的 sqlserver_mcs 数据源继承该配置后在 SQL Server 上报「对象名 DUAL 无效」。
+修改：prod 全局改为 SELECT 1；McsDataSourceManager 创建/恢复 SQL Server 数据源时显式设置 validationQuery=SELECT 1。
+jeecg-boot/jeecg-module-system/jeecg-system-start/src/main/resources/application-prod.yml
+jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/src/main/java/org/jeecg/modules/xslmes/mcs/datasource/McsDataSourceManager.java
diff --git a/jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/src/main/java/org/jeecg/modules/xslmes/mcs/datasource/McsDataSourceManager.java b/jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/src/main/java/org/jeecg/modules/xslmes/mcs/datasource/McsDataSourceManager.java
index 99b1e3ec..d01bf1b4 100644
--- a/jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/src/main/java/org/jeecg/modules/xslmes/mcs/datasource/McsDataSourceManager.java
+++ b/jeecg-boot/jeecg-boot-module/jeecg-module-xslmes/src/main/java/org/jeecg/modules/xslmes/mcs/datasource/McsDataSourceManager.java
@@ -3,6 +3,7 @@ package org.jeecg.modules.xslmes.mcs.datasource;
 import com.alibaba.druid.pool.DruidDataSource;
 import com.baomidou.dynamic.datasource.DynamicRoutingDataSource;
 import com.baomidou.dynamic.datasource.creator.DataSourceProperty;
+import com.baomidou.dynamic.datasource.creator.druid.DruidConfig;
 import com.baomidou.dynamic.datasource.creator.druid.DruidDataSourceCreator;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang.StringUtils;
@@ -171,9 +172,22 @@ public class McsDataSourceManager {
         property.setUrl(buildJdbcUrl(config));
         property.setUsername(config.getDbUsername());
         property.setPassword(plainPassword);
+        applySqlServerDruidConfig(property);
         return property;
     }
 
+    /**
+     * SQL Server 不支持 Oracle/MySQL 的 DUAL 表，覆盖全局 validationQuery 避免连接池校验失败
+     */
+    private void applySqlServerDruidConfig(DataSourceProperty property) {
+        DruidConfig druid = property.getDruid();
+        if (druid == null) {
+            druid = new DruidConfig();
+            property.setDruid(druid);
+        }
+        druid.setValidationQuery("SELECT 1");
+    }
+
     private void restoreYmlDataSource(DynamicRoutingDataSource routing) {
         if (StringUtils.isBlank(ymlUrl)) {
             log.warn("[MCS中间库] yml 中未配置 sqlserver_mcs，无法恢复默认数据源");
@@ -186,6 +200,7 @@ public class McsDataSourceManager {
             property.setUrl(ymlUrl);
             property.setUsername(ymlUsername);
             property.setPassword(ymlPassword);
+            applySqlServerDruidConfig(property);
             routing.addDataSource(DS_KEY, dataSourceCreator.createDataSource(property));
         } catch (Exception e) {
             log.error("[MCS中间库] 恢复 yml 默认数据源失败", e);
diff --git a/jeecg-boot/jeecg-module-system/jeecg-system-start/src/main/resources/application-prod.yml b/jeecg-boot/jeecg-module-system/jeecg-system-start/src/main/resources/application-prod.yml
index 77174b48..887442c9 100644
--- a/jeecg-boot/jeecg-module-system/jeecg-system-start/src/main/resources/application-prod.yml
+++ b/jeecg-boot/jeecg-module-system/jeecg-system-start/src/main/resources/application-prod.yml
@@ -128,7 +128,8 @@ spring:
         timeBetweenEvictionRunsMillis: 60000
         # 配置一个连接在池中最小生存的时间，单位是毫秒
         minEvictableIdleTimeMillis: 300000
-        validationQuery: SELECT 1 FROM DUAL
+        # SQL Server 中间库不支持 DUAL，使用通用校验语句（MySQL/SQL Server 均兼容）
+        validationQuery: SELECT 1
         testWhileIdle: true
         testOnBorrow: false
         testOnReturn: false