diff --git a/scripts/chat_openai_api.py b/scripts/chat_openai_api.py
index 4ad5e55..2f2bc53 100644
--- a/scripts/chat_openai_api.py
+++ b/scripts/chat_openai_api.py
@@ -7,13 +7,13 @@ client = OpenAI(
 stream = True
 conversation_history_origin = []
 conversation_history = conversation_history_origin.copy()
+history_messages_num = 2  # 设置为偶数（Q+A），为0则每次不携带历史对话进行独立QA
 while True:
-    conversation_history = conversation_history_origin.copy()
     query = input('[Q]: ')
     conversation_history.append({"role": "user", "content": query})
     response = client.chat.completions.create(
         model="minimind",
-        messages=conversation_history,
+        messages=conversation_history[-history_messages_num:],
         stream=stream
     )
     if not stream: