diff --git a/src/simulation/simulation_trader.py b/src/simulation/simulation_trader.py
index cd837e6..d044a48 100644
--- a/src/simulation/simulation_trader.py
+++ b/src/simulation/simulation_trader.py
@@ -9,6 +9,8 @@ from trade_constants import (
 from position_manager import PositionManager
 from base_trader import BaseTrader
 import random
+from typing import Dict
+from local_position import LocalPosition
 
 
 class SimulationTrader(BaseTrader):
@@ -130,11 +132,11 @@ class SimulationTrader(BaseTrader):
         self.logger.info(message)
 
         position_managers = self.get_all_position_managers()
-        positions = {}
+        positions: Dict[str, LocalPosition] = {}
         for position_manager in position_managers.values():
             positions.update(position_manager.get_positions())
         # convert to json list
-        return [position.to_dict() for position in positions.values()]
+        return [{"account_id": "simulation", "code": position.code, "total_amount": position.total_amount, "closeable_amount": position.closeable_amount} for position in positions.values()]
 
     def get_today_trades(self):
         message = "模拟交易：查询今日成交"
@@ -157,15 +159,16 @@ class SimulationTrader(BaseTrader):
         Returns:
             dict: 持仓详情，如果未持有则返回None
         """
-        positions = self.position_manager.get_positions(strategy_name)
+        position_manager = self.get_position_manager(strategy_name)
+        positions = position_manager.get_positions()
         if stock_code in positions:
             position_info = positions[stock_code]
             return {
                 "account_id": "simulation",
-                "stock_code": stock_code,
+                "code": stock_code,
                 "strategy_name": strategy_name,
-                "volume": position_info.total_amount,
-                "can_use_volume": position_info.closeable_amount,
+                "total_amount": position_info.total_amount,
+                "closeable_amount": position_info.closeable_amount,
             }
         return None