diff --git a/pkg/provider/modelmgr/apis/chatcmpl.py b/pkg/provider/modelmgr/apis/chatcmpl.py
index 028b208..3f1cfb3 100644
--- a/pkg/provider/modelmgr/apis/chatcmpl.py
+++ b/pkg/provider/modelmgr/apis/chatcmpl.py
@@ -102,9 +102,16 @@ class OpenAIChatCompletions(api.LLMAPIRequester):
         messages: typing.List[llm_entities.Message],
         funcs: typing.List[tools_entities.LLMFunction] = None,
     ) -> llm_entities.Message:
-        req_messages = [  # req_messages 仅用于类内，外部同步由 query.messages 进行
-            m.dict(exclude_none=True) for m in messages
-        ]
+        req_messages = []  # req_messages 仅用于类内，外部同步由 query.messages 进行
+        for m in messages:
+            msg_dict = m.dict(exclude_none=True)
+            content = msg_dict.get("content")
+            if isinstance(content, list):
+                # 检查 content 列表中是否每个部分都是文本
+                if all(isinstance(part, dict) and part.get("type") == "text" for part in content):
+                    # 将所有文本部分合并为一个字符串
+                    msg_dict["content"] = "\n".join(part["text"] for part in content)
+            req_messages.append(msg_dict)
 
         try:
             return await self._closure(req_messages, model, funcs)