diff --git a/backend/src/services/pickingBinSalesAnalysis.js b/backend/src/services/pickingBinSalesAnalysis.js
index 6d294ab..cf44c10 100644
--- a/backend/src/services/pickingBinSalesAnalysis.js
+++ b/backend/src/services/pickingBinSalesAnalysis.js
@@ -169,6 +169,15 @@ async function fetchPickingBinSkuRows(cloudDb, wmsCoIds, options = {}) {
          AND oi.sku_type = 'combine'
        GROUP BY o.wms_co_id, ci.src_sku_id
     ),
+    shipAgg AS (
+      -- 同一个 仓库+商品 可能同时命中多个来源分支（线上普通/线上组合装/全民客户普通/全民客户组合装），
+      -- 必须先按 仓库+商品 汇总成一行再 join，否则一个仓位行会被拆成多行、每行只带某分支的销量。
+      SELECT wmsCoId,
+             skuId,
+             SUM(CAST(salesQty AS DECIMAL(18, 2))) AS salesQty
+        FROM ship
+       GROUP BY wmsCoId, skuId
+    ),
     binAgg AS (
       SELECT wmsCoId,
              binName,
@@ -192,7 +201,7 @@ async function fetchPickingBinSkuRows(cloudDb, wmsCoIds, options = {}) {
         ON sp.wmsCoId = b.wmsCoId AND sp.skuId = b.skuId AND sp.binType = b.binType
       JOIN binAgg a
         ON a.wmsCoId = b.wmsCoId AND a.binName = b.binName AND a.binType = b.binType
-      LEFT JOIN ship s
+      LEFT JOIN shipAgg s
         ON s.wmsCoId = b.wmsCoId AND s.skuId = b.skuId
      GROUP BY b.wmsCoId, b.binName, b.binType, b.skuId, a.skuCount, s.salesQty, sp.binCount
     HAVING ABS(SUM(CAST(b.binSkuQty AS DECIMAL(18, 2)))) > 0.0001
diff --git a/backend/test/pickingBinSalesAnalysis.test.js b/backend/test/pickingBinSalesAnalysis.test.js
index b6e5fa5..f294762 100644
--- a/backend/test/pickingBinSalesAnalysis.test.js
+++ b/backend/test/pickingBinSalesAnalysis.test.js
@@ -135,6 +135,10 @@ test('fetchPickingBinSkuRows 只统计真实拣选仓位，排除 Pack 箱记录
   assert.ok(!captured.sqlText.includes('b.binType IN'));
   assert.equal(captured.params.t0, undefined);
   assert.equal(captured.params.binTypes, undefined);
+  // 多来源 union 后必须再按 仓库+商品 汇总，否则同一仓位行会被拆成多行
+  assert.ok(captured.sqlText.includes('shipAgg AS ('));
+  assert.ok(captured.sqlText.includes('LEFT JOIN shipAgg s'));
+  assert.ok(!captured.sqlText.includes('LEFT JOIN ship s'));
 });
 
 test('销量覆盖 4 个来源：线上普通行 + 组合装展开 + 全民客户普通行 + 全民客户组合装展开', async () => {