diff --git a/frontend/app.py b/frontend/app.py
index e1b00f5..11d06b0 100644
--- a/frontend/app.py
+++ b/frontend/app.py
@@ -177,7 +177,7 @@ def main():
         
         api_key = st.text_input("API Key", type="password", value=os.getenv("DASHSCOPE_API_KEY", ""))
         model = st.selectbox("模型", ["qwen3.5-flash", "qwen-max", "qwen-plus"], index=0)
-        max_round = st.slider("最大轮数", 5, 30, 15)
+        max_round = st.slider("最大轮数", 5, 300, 15)
         
         st.divider()