diff --git a/inventory-backend/app/services/inbound/buy_service.py b/inventory-backend/app/services/inbound/buy_service.py
index 60d8e8e..c79a0ea 100644
--- a/inventory-backend/app/services/inbound/buy_service.py
+++ b/inventory-backend/app/services/inbound/buy_service.py
@@ -281,8 +281,8 @@ class BuyInboundService:
         try:
             stock = StockBuy.query.get(stock_id)
             if not stock: raise ValueError("记录不存在")
-            # 提前获取物料名称用于审计日志
-            material_name = stock.material_name
+            # 提前获取物料名称用于审计日志（通过外键关系 base.name 获取）
+            material_name = stock.base.name if stock.base else '未知物料'
             db.session.delete(stock)
             db.session.commit()
             return material_name
diff --git a/inventory-backend/app/services/inbound/product_service.py b/inventory-backend/app/services/inbound/product_service.py
index 70f4b80..a67c654 100644
--- a/inventory-backend/app/services/inbound/product_service.py
+++ b/inventory-backend/app/services/inbound/product_service.py
@@ -253,8 +253,8 @@ class ProductInboundService:
         try:
             stock = StockProduct.query.get(stock_id)
             if stock:
-                # 提前获取物料名称用于审计日志
-                material_name = stock.material_name
+                # 提前获取物料名称用于审计日志（通过外键关系 base.name 获取）
+                material_name = stock.base.name if stock.base else '未知物料'
                 db.session.delete(stock)
                 db.session.commit()
                 return material_name
diff --git a/inventory-backend/app/services/inbound/semi_service.py b/inventory-backend/app/services/inbound/semi_service.py
index a6b28e9..4e8cd7f 100644
--- a/inventory-backend/app/services/inbound/semi_service.py
+++ b/inventory-backend/app/services/inbound/semi_service.py
@@ -342,8 +342,8 @@ class SemiInboundService:
             stock = StockSemi.query.get(stock_id)
             if not stock:
                 raise ValueError("记录不存在")
-            # 提前获取物料名称用于审计日志
-            material_name = stock.material_name
+            # 提前获取物料名称用于审计日志（通过外键关系 base.name 获取）
+            material_name = stock.base.name if stock.base else '未知物料'
             db.session.delete(stock)
             db.session.commit()
             return material_name