diff --git a/trading_system/binance_client.py b/trading_system/binance_client.py
index 299c8c9..c93d8c6 100644
--- a/trading_system/binance_client.py
+++ b/trading_system/binance_client.py
@@ -1399,8 +1399,13 @@ class BinanceClient:
                 order = await _submit(order_params)
             except BinanceAPIException as e:
                 code = getattr(e, "code", None)
-                if code in (-4061, -1106):
+                if code in (-4061, -1106, -1022):
                     retry_params = dict(order_params)
+                    # 关键修复：重试时必须清除之前的 timestamp 和 signature，
+                    # 让 python-binance 重新生成，否则会报 -1022 Signature invalid
+                    retry_params.pop('timestamp', None)
+                    retry_params.pop('signature', None)
+                    
                     if code == -4061:
                         logger.error(f"{symbol} 触发 -4061（持仓模式不匹配），尝试自动兜底重试一次")
                         if "positionSide" in retry_params:
diff --git a/trading_system/position_manager.py b/trading_system/position_manager.py
index a3c97ef..25e7683 100644
--- a/trading_system/position_manager.py
+++ b/trading_system/position_manager.py
@@ -1509,14 +1509,25 @@ class PositionManager:
             except Exception as e:
                 logger.debug(f"{symbol} 检查止盈触发条件时出错: {e}")
 
-        tp_order = await self.client.place_trigger_close_position_order(
-            symbol=symbol,
-            position_direction=side,
-            trigger_type="TAKE_PROFIT_MARKET",
-            stop_price=take_profit,
-            current_price=current_price,
-            working_type="MARK_PRICE",
-        )
+        try:
+            tp_order = await self.client.place_trigger_close_position_order(
+                symbol=symbol,
+                position_direction=side,
+                trigger_type="TAKE_PROFIT_MARKET",
+                stop_price=take_profit,
+                current_price=current_price,
+                working_type="MARK_PRICE",
+            )
+        except Exception as e:
+            # 处理 -2021: Order would immediately trigger
+            error_msg = str(e)
+            if "-2021" in error_msg or "immediately trigger" in error_msg:
+                logger.warning(f"{symbol} ⚠️ 止盈单会立即触发(-2021)，视为已到达止盈位，立即执行市价止盈")
+                await self.close_position(symbol, reason='take_profit')
+                return
+            else:
+                logger.warning(f"{symbol} 挂止盈单失败: {e}")
+                tp_order = None
         if tp_order:
             logger.info(f"{symbol} ✓ 止盈单已成功挂到交易所: {tp_order.get('algoId', 'N/A')}")
         else: