diff --git a/inventory-backend/app/api/v1/inbound/stock.py b/inventory-backend/app/api/v1/inbound/stock.py
index aa6cae4..4978234 100644
--- a/inventory-backend/app/api/v1/inbound/stock.py
+++ b/inventory-backend/app/api/v1/inbound/stock.py
@@ -522,17 +522,23 @@ def export_stocktake():
                 stock = StockProduct.query.get(stock_id) if StockProduct else None
             else:
                 return {'name': '-', 'sku': '-', 'spec': '-', 'unit': '-'}
-            
+
             if not stock:
                 return {'name': '-', 'sku': '-', 'spec': '-', 'unit': '-'}
+
+            # 安全获取 sku
+            stock_sku = getattr(stock, 'sku', None) or getattr(stock, 'SKU', None) or '-'
             
             # 尝试从MaterialBase获取名称
-            material = MaterialBase.query.filter_by(sku=stock.sku).first()
+            material = None
+            if stock_sku and stock_sku != '-':
+                material = MaterialBase.query.filter_by(sku=stock_sku).first()
+            
             return {
-                'name': material.name if material else stock.sku,
-                'sku': stock.sku,
-                'spec': stock.spec_model or stock.standard or '-',
-                'unit': stock.unit or '个'
+                'name': material.name if material else stock_sku,
+                'sku': stock_sku,
+                'spec': getattr(stock, 'spec_model', None) or getattr(stock, 'standard', None) or '-',
+                'unit': getattr(stock, 'unit', None) or '个'
             }
         
         def set_header_row(ws, headers):