diff --git a/inventory-backend/app/api/v1/transactions.py b/inventory-backend/app/api/v1/transactions.py
index 44c795c..15735e8 100644
--- a/inventory-backend/app/api/v1/transactions.py
+++ b/inventory-backend/app/api/v1/transactions.py
@@ -281,7 +281,14 @@ def dispatch_borrow():
     执行借库扣减
     请求体: {
         approval_id: int,   // 关联的审批单ID
-        items: [...],       // 扫码选中的库存物品（含 id, source_table, out_quantity）
+        items: [            // 扫码选中的库存物品
+            {
+                id: int,           // 库存主键（按 source_table 路由到 StockBuy/StockSemi/StockProduct）
+                source_table: str, // 'stock_buy' | 'stock_semi' | 'stock_product'
+                sku: str,          // 用于按 (source_table, sku) 与审批单做超额交叉校验
+                out_quantity: float
+            }
+        ],
         borrower_name: str,
         signature_path: str,
         remark: str,
diff --git a/inventory-web/src/views/transaction/borrow.vue b/inventory-web/src/views/transaction/borrow.vue
index 857850c..7e8ee1e 100644
--- a/inventory-web/src/views/transaction/borrow.vue
+++ b/inventory-web/src/views/transaction/borrow.vue
@@ -556,7 +556,7 @@ const submitForm = async () => {
         if (isNaN(safeQty) || safeQty <= 0) safeQty = 1
 
         return {
-          stock_id: item.id || 0,
+          id: item.id || 0,
           source_table: item.source_table || '',
           sku: item.sku ? String(item.sku) : (item.barcode ? String(item.barcode) : 'NO_SKU'),
           barcode: item.barcode ? String(item.barcode) : '',