diff --git a/erniebot-agent/src/erniebot_agent/agents/agent.py b/erniebot-agent/src/erniebot_agent/agents/agent.py
index d04a9c96..ed02f714 100644
--- a/erniebot-agent/src/erniebot_agent/agents/agent.py
+++ b/erniebot-agent/src/erniebot_agent/agents/agent.py
@@ -361,9 +361,37 @@ async def _run_llm_stream(self, messages: List[Message], **opts: Any) -> AsyncIt
             )
         opts["system"] = self.system.content if self.system is not None else None
         opts["plugins"] = self._plugins
-        llm_ret = await self.llm.chat(messages, stream=True, functions=functions, **opts)
-        async for msg in llm_ret:
-            yield LLMResponse(message=msg)
+        # llm_ret = await self.llm.chat(messages, stream=True, functions=functions, **opts)
+        # async for msg in llm_ret:
+        #     yield LLMResponse(message=msg)
+        # print(self.llm.extra_params.get("enable_multi_step_tool_call"))
+        # 流式时，无法同时处理多个工具调用
+        # 所以只有关闭多步工具调用时才用流式
+        if self.llm.extra_data.get("multi_step_tool_call_close", True):
+            llm_ret = await self.llm.chat(messages, stream=True, functions=functions, **opts)
+            async for msg in llm_ret:
+                print("_run_llm_stream", msg)
+                yield LLMResponse(message=msg)
+        else:
+            llm_ret = await self.llm.chat(messages, stream=False, functions=functions, **opts)
+            class MyAsyncIterator:
+                def __init__(self, data):
+                    self.data = data
+                    self.index = 0
+                async def __anext__(self):
+                    if self.index < len(self.data):
+                        result = self.data[self.index]
+                        self.index += 1
+                        return result
+                    else:
+                        raise StopAsyncIteration
+                def __aiter__(self):
+                    return self
+
+            llm_ret = MyAsyncIterator([llm_ret])
+            async for msg in llm_ret:
+                print("_run_llm_stream", msg)
+                yield LLMResponse(message=msg)
 
     async def _run_tool(self, tool: BaseTool, tool_args: str) -> ToolResponse:
         parsed_tool_args = self._parse_tool_args(tool_args)
diff --git a/erniebot-agent/src/erniebot_agent/tools/remote_tool.py b/erniebot-agent/src/erniebot_agent/tools/remote_tool.py
index da5ffec6..9315b8a8 100644
--- a/erniebot-agent/src/erniebot_agent/tools/remote_tool.py
+++ b/erniebot-agent/src/erniebot_agent/tools/remote_tool.py
@@ -6,7 +6,7 @@
 from copy import deepcopy
 from typing import Any, Dict, List, Optional, Type
 
-import requests
+import httpx
 
 from erniebot_agent.file import (
     FileManager,
@@ -113,6 +113,9 @@ async def __call__(self, **tool_arguments: Dict[str, Any]) -> Any:
         return await self.__post_process__(tool_response)
 
     async def send_request(self, tool_arguments: Dict[str, Any]) -> dict:
+        # async http request
+        requests = httpx.AsyncClient(timeout=None)
+
         url = "/".join([self.server_url.strip("/"), self.tool_view.uri.strip("/")])
         url += "?version=" + self.version
 
@@ -147,13 +150,13 @@ async def send_request(self, tool_arguments: Dict[str, Any]) -> dict:
             )
 
         if self.tool_view.method == "get":
-            response = requests.get(url, **requests_inputs)  # type: ignore
+            response = await requests.get(url, **requests_inputs)  # type: ignore
         elif self.tool_view.method == "post":
-            response = requests.post(url, **requests_inputs)  # type: ignore
+            response = await requests.post(url, **requests_inputs)  # type: ignore
         elif self.tool_view.method == "put":
-            response = requests.put(url, **requests_inputs)  # type: ignore
+            response = await requests.put(url, **requests_inputs)  # type: ignore
         elif self.tool_view.method == "delete":
-            response = requests.delete(url, **requests_inputs)  # type: ignore
+            response = await requests.delete(url, **requests_inputs)  # type: ignore
         else:
             raise RemoteToolError(f"method<{self.tool_view.method}> is invalid", stage="Executing")
 
diff --git a/erniebot-agent/src/erniebot_agent/tools/utils.py b/erniebot-agent/src/erniebot_agent/tools/utils.py
index 85148c21..caa30a45 100644
--- a/erniebot-agent/src/erniebot_agent/tools/utils.py
+++ b/erniebot-agent/src/erniebot_agent/tools/utils.py
@@ -5,9 +5,9 @@
 from copy import deepcopy
 from typing import Any, Dict, Optional, Type, no_type_check
 
+from httpx._models import Response
 from openapi_spec_validator import validate
 from openapi_spec_validator.readers import read_from_filename
-from requests import Response
 
 from erniebot_agent.file import File, FileManager
 from erniebot_agent.file.protocol import (