diff --git a/trading_system/position_manager.py b/trading_system/position_manager.py
index 1e6358c..9fdf4f7 100644
--- a/trading_system/position_manager.py
+++ b/trading_system/position_manager.py
@@ -1199,8 +1199,9 @@ class PositionManager:
                 if side == "BUY":
                     # 做多：当前价 <= 止损价，说明已触发止损
                     if current_price_val <= stop_loss_val:
+                        entry_price_str = f"{entry_price_val:.8f}" if entry_price_val is not None else 'N/A'
                         logger.error(f"{symbol} ⚠️ 当前价格({current_price_val:.8f})已触发止损价({stop_loss_val:.8f})，无法挂止损单，立即执行市价平仓保护！")
-                        logger.error(f"  入场价: {entry_price_val:.8f if entry_price_val else 'N/A'}")
+                        logger.error(f"  入场价: {entry_price_str}")
                         # 立即执行市价平仓
                         await self.close_position(symbol, reason='stop_loss')
                         return
@@ -1216,8 +1217,9 @@ class PositionManager:
                 elif side == "SELL":
                     # 做空：当前价 >= 止损价，说明已触发止损
                     if current_price_val >= stop_loss_val:
+                        entry_price_str = f"{entry_price_val:.8f}" if entry_price_val is not None else 'N/A'
                         logger.error(f"{symbol} ⚠️ 当前价格({current_price_val:.8f})已触发止损价({stop_loss_val:.8f})，无法挂止损单，立即执行市价平仓保护！")
-                        logger.error(f"  入场价: {entry_price_val:.8f if entry_price_val else 'N/A'}")
+                        logger.error(f"  入场价: {entry_price_str}")
                         # 立即执行市价平仓
                         await self.close_position(symbol, reason='stop_loss')
                         return