diff --git a/vnpy/trader/app/ctaStrategy/ctaBacktesting.py b/vnpy/trader/app/ctaStrategy/ctaBacktesting.py
index 0f159152..88db33ab 100644
--- a/vnpy/trader/app/ctaStrategy/ctaBacktesting.py
+++ b/vnpy/trader/app/ctaStrategy/ctaBacktesting.py
@@ -353,7 +353,8 @@ class BacktestingEngine(object):
                 self.strategy.onOrder(order)
                 
                 # 从字典中删除该限价单
-                del self.workingLimitOrderDict[orderID]
+                if orderID in self.workingLimitOrderDict:
+                    del self.workingLimitOrderDict[orderID]
                 
     #----------------------------------------------------------------------
     def crossStopOrder(self):