diff --git a/inventory-backend/app/api/v1/inbound/stock.py b/inventory-backend/app/api/v1/inbound/stock.py
index 41ecf28..4270b1e 100644
--- a/inventory-backend/app/api/v1/inbound/stock.py
+++ b/inventory-backend/app/api/v1/inbound/stock.py
@@ -694,9 +694,117 @@ def export_stocktake():
             ws3.cell(row=row_idx, column=8, value=pending_qty).border = thin_border
             ws3.cell(row=row_idx, column=9, value=to_beijing_time(borrow.borrow_time)).border = thin_border
             ws3.cell(row=row_idx, column=10, value='无限期' if not borrow.expected_return_time else to_beijing_time(borrow.expected_return_time)).border = thin_border
-        
+
+        # ===== Sheet 4: 未盘点明细(疑似漏盘) =====
+        # 逻辑：获取已盘点的集合，遍历库存表，找出未盘点且有库存的物资
+        ws4 = wb.create_sheet("未盘点明细(疑似漏盘)")
+        unscanned_headers = ["物料名称", "SKU", "规格型号", "库位", "调整后账面数", "实盘数", "差异数", "状态"]
+        set_header_row(ws4, unscanned_headers)
+
+        # 获取已盘点的 (source_table, stock_id) 集合
+        all_drafts = StocktakeDraft.query.all()
+        scanned_set = {(d.source_table, d.stock_id) for d in all_drafts}
+
+        def get_borrowed_qty(source_table, stock_id):
+            """获取某库存的借出未还数量"""
+            try:
+                borrowed = TransBorrow.query.filter(
+                    TransBorrow.source_table == source_table,
+                    TransBorrow.stock_id == stock_id,
+                    TransBorrow.is_returned == False
+                ).all()
+                total = sum((b.quantity or 0) - (b.returned_quantity or 0) for b in borrowed)
+                return total
+            except:
+                return 0
+
+        unscanned_items = []
+
+        # 遍历 StockBuy
+        for stock in StockBuy.query.all():
+            key = ('stock_buy', stock.id)
+            if key in scanned_set:
+                continue
+            stock_qty = float(stock.stock_quantity or 0)
+            if stock_qty <= 0:
+                continue
+            # 扣除外借数量
+            borrowed_qty = get_borrowed_qty('stock_buy', stock.id)
+            expected_qty = stock_qty - borrowed_qty
+            if expected_qty > 0:
+                mat_info = get_material_info('stock_buy', stock.id)
+                unscanned_items.append({
+                    'name': mat_info['name'],
+                    'sku': mat_info['sku'],
+                    'spec': mat_info['spec'],
+                    'location': mat_info['location'],
+                    'stock_qty': expected_qty,
+                    'actual_qty': 0,
+                    'diff_qty': -expected_qty,
+                    'status': '未盘点'
+                })
+
+        # 遍历 StockSemi
+        if StockSemi:
+            for stock in StockSemi.query.all():
+                key = ('stock_semi', stock.id)
+                if key in scanned_set:
+                    continue
+                stock_qty = float(stock.stock_quantity or 0)
+                if stock_qty <= 0:
+                    continue
+                borrowed_qty = get_borrowed_qty('stock_semi', stock.id)
+                expected_qty = stock_qty - borrowed_qty
+                if expected_qty > 0:
+                    mat_info = get_material_info('stock_semi', stock.id)
+                    unscanned_items.append({
+                        'name': mat_info['name'],
+                        'sku': mat_info['sku'],
+                        'spec': mat_info['spec'],
+                        'location': mat_info['location'],
+                        'stock_qty': expected_qty,
+                        'actual_qty': 0,
+                        'diff_qty': -expected_qty,
+                        'status': '未盘点'
+                    })
+
+        # 遍历 StockProduct
+        if StockProduct:
+            for stock in StockProduct.query.all():
+                key = ('stock_product', stock.id)
+                if key in scanned_set:
+                    continue
+                stock_qty = float(stock.stock_quantity or 0)
+                if stock_qty <= 0:
+                    continue
+                borrowed_qty = get_borrowed_qty('stock_product', stock.id)
+                expected_qty = stock_qty - borrowed_qty
+                if expected_qty > 0:
+                    mat_info = get_material_info('stock_product', stock.id)
+                    unscanned_items.append({
+                        'name': mat_info['name'],
+                        'sku': mat_info['sku'],
+                        'spec': mat_info['spec'],
+                        'location': mat_info['location'],
+                        'stock_qty': expected_qty,
+                        'actual_qty': 0,
+                        'diff_qty': -expected_qty,
+                        'status': '未盘点'
+                    })
+
+        # 写入未盘点明细
+        for row_idx, item in enumerate(unscanned_items, 2):
+            ws4.cell(row=row_idx, column=1, value=item['name']).border = thin_border
+            ws4.cell(row=row_idx, column=2, value=item['sku']).border = thin_border
+            ws4.cell(row=row_idx, column=3, value=item['spec']).border = thin_border
+            ws4.cell(row=row_idx, column=4, value=item['location']).border = thin_border
+            ws4.cell(row=row_idx, column=5, value=item['stock_qty']).border = thin_border
+            ws4.cell(row=row_idx, column=6, value=item['actual_qty']).border = thin_border
+            ws4.cell(row=row_idx, column=7, value=item['diff_qty']).border = thin_border
+            ws4.cell(row=row_idx, column=8, value=item['status']).border = thin_border
+
         # 调整列宽
-        for ws in [ws1, ws2, ws3]:
+        for ws in [ws1, ws2, ws3, ws4]:
             for col in ws.columns:
                 max_length = 0
                 col_letter = col[0].column_letter