diff --git a/backend_api_python/app/services/trading_executor.py b/backend_api_python/app/services/trading_executor.py
index abbcce4..1acbc1f 100644
--- a/backend_api_python/app/services/trading_executor.py
+++ b/backend_api_python/app/services/trading_executor.py
@@ -591,7 +591,8 @@ class TradingExecutor:
             # 初始化阶段：获取历史K线并计算指标
             # ============================================
             # logger.info(f"策略 {strategy_id} 初始化：获取历史K线数据...")
-            klines = self._fetch_latest_kline(symbol, timeframe, limit=6000)
+            history_limit = os.getenv('K_LINE_HISTORY_GET_NUMBER', 500)
+            klines = self._fetch_latest_kline(symbol, timeframe, limit=history_limit)
             if not klines or len(klines) < 2:
                 logger.error(f"Strategy {strategy_id} failed to fetch K-lines")
                 return
diff --git a/backend_api_python/env.example b/backend_api_python/env.example
index b4eaf0f..8fca97c 100644
--- a/backend_api_python/env.example
+++ b/backend_api_python/env.example
@@ -286,3 +286,5 @@ CREDITS_REGISTER_BONUS=100
 # Referral bonus credits (邀请用户赠送积分，邀请人获得)
 CREDITS_REFERRAL_BONUS=50
 
+# History K-Line ticket get number （策略中默认获取历史K线数量）
+K_LINE_HISTORY_GET_NUMBER=500