diff --git a/backend/api/routes/trades.py b/backend/api/routes/trades.py
index ac460bf..777dafc 100644
--- a/backend/api/routes/trades.py
+++ b/backend/api/routes/trades.py
@@ -391,13 +391,13 @@ async def get_trade_stats(
 
 @router.post("/sync-binance")
 async def sync_trades_from_binance(
-    days: int = Query(7, ge=1, le=30, description="同步最近N天的订单")
+    account_id: int = Depends(get_account_id),
+    days: int = Query(7, ge=1, le=30, description="同步最近N天的订单"),
 ):
     """
-    从币安同步历史订单，确保数据库与币安一致
-    
-    Args:
-        days: 同步最近N天的订单（默认7天）
+    从币安同步历史订单，补全 DB 中缺失的 exit_order_id / 平仓信息。
+    **WS 已接入后**：开仓/平仓订单号主要由 User Data Stream 回写，此接口仅作**冷启动或补漏**，建议降低调用频率。
+    仅对「DB 中近期有记录的 symbol」拉取订单，避免全市场逐 symbol 请求。
     """
     try:
         logger.info(f"开始从币安同步历史订单（最近{days}天）...")
@@ -416,7 +416,45 @@ async def sync_trades_from_binance(
         
         from binance_client import BinanceClient
         import config
-        
+        from database.models import DEFAULT_ACCOUNT_ID
+
+        # 计算时间范围（秒，供 DB 查询）
+        end_time_ms = int(time.time() * 1000)
+        start_time_ms = int((datetime.now() - timedelta(days=days)).timestamp() * 1000)
+        start_ts_sec = start_time_ms // 1000
+        end_ts_sec = end_time_ms // 1000
+
+        # 仅对 DB 中在时间范围内有 open/closed 记录的 symbol 拉取订单（WS 已回写订单号，大幅减少请求）
+        symbol_list = []
+        try:
+            trades_in_range = Trade.get_all(
+                start_timestamp=start_ts_sec,
+                end_timestamp=end_ts_sec,
+                account_id=account_id or DEFAULT_ACCOUNT_ID,
+            )
+            symbol_list = list({t.get("symbol") for t in (trades_in_range or []) if t.get("symbol")})
+        except Exception as e:
+            logger.warning(f"从 DB 获取 symbol 列表失败，将跳过同步: {e}")
+            return {
+                "success": True,
+                "message": "未获取到需同步的交易对，跳过（WS 正常时订单号已由推送回写）",
+                "total_orders": 0,
+                "updated_trades": 0,
+                "close_orders": 0,
+                "open_orders": 0,
+            }
+
+        if not symbol_list:
+            logger.info("DB 内在时间范围内无交易记录，跳过全量拉取订单（WS 为主时无需频繁同步）")
+            return {
+                "success": True,
+                "message": "近期无交易记录，未请求币安订单；WS 正常时订单号已由推送回写",
+                "total_orders": 0,
+                "updated_trades": 0,
+                "close_orders": 0,
+                "open_orders": 0,
+            }
+
         # 初始化客户端
         client = BinanceClient(
             api_key=config.BINANCE_API_KEY,
@@ -427,42 +465,23 @@ async def sync_trades_from_binance(
         await client.connect()
         
         try:
-            import time
-            from datetime import datetime, timedelta
-            
-            # 计算时间范围
-            end_time = int(time.time() * 1000)  # 当前时间（毫秒）
-            start_time = int((datetime.now() - timedelta(days=days)).timestamp() * 1000)
-            
-            # 获取所有已成交的订单（包括开仓和平仓）
+            # 仅对上述 symbol 拉取订单
             all_orders = []
             try:
-                # 获取所有交易对的订单
-                # 注意：币安API可能需要分交易对查询，这里先获取所有交易对
-                symbols = await client.client.futures_exchange_info()
-                symbol_list = [s['symbol'] for s in symbols.get('symbols', []) if s.get('contractType') == 'PERPETUAL']
-                
-                logger.info(f"开始同步 {len(symbol_list)} 个交易对的订单...")
-                
+                logger.info(f"仅对 {len(symbol_list)} 个有 DB 记录的 symbol 拉取订单（已跳过全市场请求）")
                 for symbol in symbol_list:
                     try:
-                        # 获取该交易对的历史订单
                         orders = await client.client.futures_get_all_orders(
                             symbol=symbol,
-                            startTime=start_time,
-                            endTime=end_time
+                            startTime=start_time_ms,
+                            endTime=end_time_ms
                         )
-                        
-                        # 只保留已成交的订单
                         filled_orders = [o for o in orders if o.get('status') == 'FILLED']
                         all_orders.extend(filled_orders)
-                        
-                        # 避免请求过快
                         await asyncio.sleep(0.1)
                     except Exception as e:
                         logger.debug(f"获取 {symbol} 订单失败: {e}")
                         continue
-                
                 logger.info(f"从币安获取到 {len(all_orders)} 个已成交订单")
             except Exception as e:
                 logger.error(f"获取币安订单失败: {e}")
@@ -504,8 +523,8 @@ async def sync_trades_from_binance(
                             logger.debug(f"订单 {order_id} 已同步过且 exit_reason={existing_trade.get('exit_reason')}，跳过")
                             continue
                         
-                        # 查找数据库中该交易对的open状态记录（仅当前账号）
-                        open_trades = Trade.get_by_symbol(symbol, status='open', account_id=None)
+                        # 查找数据库中该交易对的 open 状态记录（仅当前账号）
+                        open_trades = Trade.get_by_symbol(symbol, status='open', account_id=account_id or DEFAULT_ACCOUNT_ID)
                         if existing_trade or open_trades:
                             # 找到匹配的交易记录（通过symbol匹配，如果有多个则取最近的）
                             trade = existing_trade or open_trades[0]  # 取第一个