diff --git a/src/routers/deep_agent_chat.py b/src/routers/deep_agent_chat.py
index d34e048..6f881e5 100644
--- a/src/routers/deep_agent_chat.py
+++ b/src/routers/deep_agent_chat.py
@@ -247,14 +247,13 @@ async def chat_stream(request: DeepAgentChatRequest):
                     "content": "",
                     "type": ""
                 }
-                delta = chunks.get("delta", "").strip()
-                if delta:
-                    payload_out.update({
-                        "type": chunks.get("type", ""),
-                        "is_delta": True,
-                        "content": delta,
-                    })
-                    yield f"data: {json.dumps(payload_out, ensure_ascii=False)}\n\n"
+                delta = chunks.get("delta", "")
+                payload_out.update({
+                    "type": chunks.get("type", ""),
+                    "is_delta": True,
+                    "content": delta,
+                })
+                yield f"data: {json.dumps(payload_out, ensure_ascii=False)}\n\n"
 
         # 获取建议消息
         if request.need_suggestion > 0 and random.random() < request.need_suggestion: