diff --git a/backend/src/api/mkhBom.js b/backend/src/api/mkhBom.js
index 252019d..a4aa503 100644
--- a/backend/src/api/mkhBom.js
+++ b/backend/src/api/mkhBom.js
@@ -29,6 +29,10 @@ function sendError(res, error, fallback) {
   res.status(status).json({ success: false, error: error.message || fallback });
 }
 
+function buildSyncQuery(query = {}) {
+  return { ...query, live: '1', fresh: '1' };
+}
+
 // MKH-BOM 资料列表（模块化组合商品 + 配件汇总）
 router.get('/list', async (req, res) => {
   try {
@@ -109,7 +113,9 @@ router.put('/notification-center', async (req, res) => {
 router.post('/sync', async (req, res) => {
   try {
     const cache = clearMkhBomCache();
-    const snapshot = await getMkhBomList({ ...(req.body?.query || {}), live: '1' });
+    // fresh=1 是真正重读库存 / 加工单 / 待发货数据的协议。
+    // 只清缓存再传 live=1 会落到旧快照，导致按钮显示“同步成功”却数值不变。
+    const snapshot = await getMkhBomList(buildSyncQuery(req.body?.query));
     res.set('Cache-Control', 'no-store');
     res.json({ success: true, data: { cache, snapshot } });
   } catch (error) {
@@ -118,3 +124,4 @@ router.post('/sync', async (req, res) => {
 });
 
 module.exports = router;
+module.exports._private = { buildSyncQuery };
diff --git a/backend/test/mkhBomApi.test.js b/backend/test/mkhBomApi.test.js
new file mode 100644
index 0000000..8d333f7
--- /dev/null
+++ b/backend/test/mkhBomApi.test.js
@@ -0,0 +1,13 @@
+'use strict';
+
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const { _private } = require('../src/api/mkhBom');
+
+test('manual MKH sync always forces a live operational refresh', () => {
+  assert.deepEqual(
+    _private.buildSyncQuery({ page: 2, fresh: 0, live: 0 }),
+    { page: 2, fresh: '1', live: '1' }
+  );
+});
diff --git a/frontend/src/pages/MkhBomData/index.jsx b/frontend/src/pages/MkhBomData/index.jsx
index 56e7043..993ac5f 100644
--- a/frontend/src/pages/MkhBomData/index.jsx
+++ b/frontend/src/pages/MkhBomData/index.jsx
@@ -916,7 +916,8 @@ const MkhBomData = () => {
       if (!result || result.success === false || !result?.data?.snapshot) {
         throw new Error(result?.error || '同步接口未返回数据库快照');
       }
-      setData(requireMkhFreshContract(result.data.snapshot));
+      setData(requireMkhFreshContract(result.data.snapshot, { requireApplied: true }));
+      lastListRefreshAtRef.current = Date.now();
       setError('');
       message.success('已实时读取最新订单、库存、BOM 与仓位数据');
     } catch (syncError) {