diff --git a/backend/src/config/cloudDatabase.js b/backend/src/config/cloudDatabase.js
index d46496f..34d4470 100644
--- a/backend/src/config/cloudDatabase.js
+++ b/backend/src/config/cloudDatabase.js
@@ -764,7 +764,20 @@ async function connectWithCandidate(candidate) {
 }
 
 async function queryWithCandidateConnection(candidate, sqlText, params = {}, options = {}) {
-  const nextPool = new sql.ConnectionPool(candidate.mssqlConfig);
+  // request.timeout（请求级）在 mssql 12.x 上实测不生效（始终按池配置的默认值掐断），
+  // 慢查询必须通过「池配置级 requestTimeout」放宽，这里允许调用方覆盖候选连接的池级超时。
+  let mssqlConfig = candidate.mssqlConfig;
+  const poolRequestTimeout = parsePositiveInt(options.connectRequestTimeoutMs, 0);
+  if (poolRequestTimeout > 0) {
+    mssqlConfig = {
+      ...candidate.mssqlConfig,
+      options: {
+        ...candidate.mssqlConfig.options,
+        requestTimeout: poolRequestTimeout,
+      },
+    };
+  }
+  const nextPool = new sql.ConnectionPool(mssqlConfig);
 
   try {
     await nextPool.connect();
@@ -1093,6 +1106,28 @@ const queryWithFreshConnection = async (sqlText, params = {}, options = {}) => {
   return [];
 };
 
+/**
+ * 慢查询专用入口：走独立临时连接，池级 requestTimeout 放宽到 SLOW_QUERY_POOL_TIMEOUT_MS。
+ * 背景：mssql 12.x 的 request.timeout（请求级）不生效，超过池默认 60s 的查询必须用
+ * 池配置级 requestTimeout 才能放宽。适用场景：动销分析这类多表大窗口聚合。
+ */
+const SLOW_QUERY_POOL_TIMEOUT_MS = parsePositiveInt(
+  process.env.CLOUD_DB_SLOW_QUERY_TIMEOUT_MS,
+  300000
+);
+
+const querySlow = async (sqlText, params = {}, options = {}) => {
+  const poolRequestTimeout = parsePositiveInt(
+    options.connectRequestTimeoutMs,
+    SLOW_QUERY_POOL_TIMEOUT_MS
+  );
+  return queryWithFreshConnection(sqlText, params, {
+    ...options,
+    connectRequestTimeoutMs: poolRequestTimeout,
+    requestTimeout: poolRequestTimeout,
+  });
+};
+
 /**
  * 测试连接
  */
@@ -1143,6 +1178,7 @@ const reload = async () => {
 module.exports = {
   getPool,
   query,
+  querySlow,
   queryWithFreshConnection,
   createPinnedQueryClient,
   test,
diff --git a/backend/src/services/pickingBinSalesAnalysis.js b/backend/src/services/pickingBinSalesAnalysis.js
index 013cb8d..6d294ab 100644
--- a/backend/src/services/pickingBinSalesAnalysis.js
+++ b/backend/src/services/pickingBinSalesAnalysis.js
@@ -198,7 +198,10 @@ async function fetchPickingBinSkuRows(cloudDb, wmsCoIds, options = {}) {
     HAVING ABS(SUM(CAST(b.binSkuQty AS DECIMAL(18, 2)))) > 0.0001
      ORDER BY b.wmsCoId, b.binType, b.binName, b.skuId`;
 
-  const rows = await cloudDb.query(
+  // 该查询 union 了 4 个销量来源（含 qmcust 全渠道扫描），全仓窗口可能超过默认 60s；
+  // mssql 12.x 请求级 timeout 不生效，必须走池级放宽的慢查询入口。
+  const runQuery = typeof cloudDb.querySlow === 'function' ? cloudDb.querySlow : cloudDb.query;
+  const rows = await runQuery(
     sqlText,
     {
       ...binIn.params,