diff --git a/inventory-backend/app/api/v1/inbound/stock.py b/inventory-backend/app/api/v1/inbound/stock.py
index e2642e3..7486e9e 100644
--- a/inventory-backend/app/api/v1/inbound/stock.py
+++ b/inventory-backend/app/api/v1/inbound/stock.py
@@ -976,19 +976,21 @@ def export_stocktake():
             if expected_qty > 0:
                 # ★ 直接使用预加载的 base 关系，避免额外查询
                 material = stock.base
+                # ★ 安全提取批号/序列号：使用 getattr 降级链
+                batch_sn = getattr(stock, 'batch_number', None) or getattr(stock, 'sn', None) or getattr(stock, 'serial_number', None) or '-'
                 mat_info = {
                     'name': material.name if material else '-',
                     'sku': getattr(stock, 'sku', None) or '-',
                     'spec': getattr(material, 'spec_model', None) if material else '-',
                     'location': getattr(stock, 'warehouse_location', None) or '-',
-                    'batch_no': getattr(stock, 'batch_number', None) or '-'  # ★ 批号字段
+                    'batch_no': batch_sn
                 }
                 unscanned_items.append({
                     'name': mat_info['name'],
                     'sku': mat_info['sku'],
                     'spec': mat_info['spec'],
                     'location': mat_info['location'],
-                    'batch_no': mat_info['batch_no'],  # ★ 批号字段
+                    'batch_no': mat_info['batch_no'],
                     'stock_qty': expected_qty,
                     'actual_qty': 0,
                     'diff_qty': -expected_qty,
@@ -1007,19 +1009,21 @@ def export_stocktake():
                 if expected_qty > 0:
                     # ★ 直接使用预加载的 base 关系，避免额外查询
                     material = stock.base
+                    # ★ 安全提取批号/序列号：使用 getattr 降级链
+                    batch_sn = getattr(stock, 'batch_number', None) or getattr(stock, 'sn', None) or getattr(stock, 'serial_number', None) or '-'
                     mat_info = {
                         'name': material.name if material else '-',
                         'sku': getattr(stock, 'sku', None) or '-',
                         'spec': getattr(material, 'spec_model', None) if material else '-',
                         'location': getattr(stock, 'warehouse_location', None) or '-',
-                        'batch_no': getattr(stock, 'batch_number', None) or '-'  # ★ 批号字段
+                        'batch_no': batch_sn
                     }
                     unscanned_items.append({
                         'name': mat_info['name'],
                         'sku': mat_info['sku'],
                         'spec': mat_info['spec'],
                         'location': mat_info['location'],
-                        'batch_no': mat_info['batch_no'],  # ★ 批号字段
+                        'batch_no': mat_info['batch_no'],
                         'stock_qty': expected_qty,
                         'actual_qty': 0,
                         'diff_qty': -expected_qty,
@@ -1040,19 +1044,21 @@ def export_stocktake():
                 if expected_qty > 0:
                     # ★ 直接使用预加载的 base 关系，避免额外查询
                     material = stock.base
+                    # ★ 安全提取批号/序列号：使用 getattr 降级链 (成品可能无此字段)
+                    batch_sn = getattr(stock, 'batch_number', None) or getattr(stock, 'sn', None) or getattr(stock, 'serial_number', None) or '-'
                     mat_info = {
                         'name': material.name if material else '-',
                         'sku': getattr(stock, 'sku', None) or '-',
                         'spec': getattr(material, 'spec_model', None) if material else '-',
                         'location': getattr(stock, 'warehouse_location', None) or '-',
-                        'batch_no': '-'  # ★ 成品无批号字段
+                        'batch_no': batch_sn
                     }
                     unscanned_items.append({
                         'name': mat_info['name'],
                         'sku': mat_info['sku'],
                         'spec': mat_info['spec'],
                         'location': mat_info['location'],
-                        'batch_no': mat_info['batch_no'],  # ★ 成品无批号字段
+                        'batch_no': mat_info['batch_no'],
                         'stock_qty': expected_qty,
                         'actual_qty': 0,
                         'diff_qty': -expected_qty,
@@ -1239,7 +1245,8 @@ def get_all_stocktake_items():
                 'id': item.id,
                 'sku': item.sku or '',
                 'barcode': item.barcode or '',
-                'batch_no': item.batch_number or '',  # ★ 批号字段
+                # ★ 安全提取批号/序列号：使用 getattr 降级
+                'batch_no': getattr(item, 'batch_number', None) or getattr(item, 'sn', None) or getattr(item, 'serial_number', None) or '',
                 'material_name': item.base.name if item.base else '',
                 'spec_model': item.base.spec_model if item.base else '',
                 'stock_qty': float(item.stock_quantity or 0),
@@ -1264,7 +1271,8 @@ def get_all_stocktake_items():
                     'id': item.id,
                     'sku': item.sku or '',
                     'barcode': item.barcode or '',
-                    'batch_no': item.batch_number or '',  # ★ 批号字段
+                    # ★ 安全提取批号/序列号：使用 getattr 降级
+                    'batch_no': getattr(item, 'batch_number', None) or getattr(item, 'sn', None) or getattr(item, 'serial_number', None) or '',
                     'material_name': item.base.name if item.base else '',
                     'spec_model': item.base.spec_model if item.base else '',
                     'stock_qty': float(item.stock_quantity or 0),
@@ -1289,7 +1297,8 @@ def get_all_stocktake_items():
                     'id': item.id,
                     'sku': item.sku or '',
                     'barcode': item.barcode or '',
-                    'batch_no': item.batch_number or '',  # ★ 批号字段 (成品无此字段则为空)
+                    # ★ 安全提取批号/序列号：使用 getattr 降级 (成品无此字段则为空)
+                    'batch_no': getattr(item, 'batch_number', None) or getattr(item, 'sn', None) or getattr(item, 'serial_number', None) or '',
                     'material_name': item.base.name if item.base else '',
                     'spec_model': item.base.spec_model if item.base else '',
                     'stock_qty': float(item.stock_quantity or 0),