diff --git a/app.py b/app.py
index 862e8704..0f0fcf0f 100644
--- a/app.py
+++ b/app.py
@@ -2,6 +2,7 @@ import re
 import requests
 import os
 from collections import defaultdict
+import time
 
 # ================== 配置区域 ==================
 # 需要删除的分组 (这些分组下的频道会被过滤)
@@ -14,7 +15,7 @@ GROUP_ORDER = ["收藏频道", "央视频道", "卫视频道", "其他频道", "
 
 M3U_SOURCES = [
     {"name": "aktv", "url": "https://git.gra.phite.ro/alantang/tvbs/raw/branch/main/output/result.m3u", "ua": "okhttp/4.12.0"},
-    {"name": "mytv", "url": "https://codeberg.org/sy147258/iptv/raw/branch/main/电视", "ua": "okhttp/4.12.0"}, 
+    {"name": "mytv", "url": "https://codeberg.org/sy147258/iptv/raw/branch/main/电视", "ua": "okhttp/4.12.0"},
     {"name": "自用收藏", "url": "http://aktv.space/live.m3u", "ua": "okhttp/4.12.0"},
     {"name": "big", "url": "https://git.gra.phite.ro/alantang/auto-iptv/raw/branch/main/live_ipv4.m3u", "ua": "okhttp/4.12.0"},
     {"name": "xhztv", "url": "http://xhztv.top/new.txt", "ua": "okhttp/4.12.0"},
@@ -25,6 +26,9 @@ M3U_SOURCES = [
     {"name": "MyIPTV", "url": "https://git.gra.phite.ro/alantang/auto-iptv/raw/branch/main/live_ipv6.m3u", "ua": "okhttp/4.12.0"}
 ]
 
+# 最大响应时间（秒），超过此时间的频道将被视为异常
+MAX_RESPONSE_TIME = 5
+
 # ================== 核心功能 ==================
 def robust_download(url, ua, max_retries=3):
     headers = {'User-Agent': ua}
@@ -35,12 +39,10 @@ def robust_download(url, ua, max_retries=3):
             response.encoding = response.apparent_encoding
             return response.text
         except Exception as e:
-            if attempt == max_retries - 1: raise
-            print(f"正在重试 {url} (第 {attempt+1} 次)")
+            if attempt == max_retries - 1:
+                raise
+            print(f"正在重试 {url} (第 {attempt + 1} 次)")
 
-def process_channel(line):
-    if any(f'group-title="{g}"' in line for g in DELETE_GROUPS):
-        return None
 
 def process_channel(line):
     """频道信息处理流水线"""
@@ -65,12 +67,13 @@ def process_channel(line):
     # 清洗频道名称
     for char in DELETE_CHARS:
         line = line.replace(char, "")
-    
+
     # 标准化CCTV写法
     line = re.sub(r'cctv-?', 'CCTV', line, flags=re.IGNORECASE)
-    
+
     return line
 
+
 def parse_m3u(content):
     channels = []
     current_channel = {}
@@ -84,6 +87,30 @@ def parse_m3u(content):
             current_channel = {}
     return channels
 
+
+def measure_response_time(url, ua):
+    headers = {'User-Agent': ua}
+    try:
+        start_time = time.time()
+        response = requests.head(url, headers=headers, timeout=MAX_RESPONSE_TIME)
+        response.raise_for_status()
+        return time.time() - start_time
+    except Exception:
+        return float('inf')
+
+
+def sort_channels_by_response_time(channels):
+    sorted_channels = []
+    for channel in channels:
+        url = channel["url"]
+        ua = M3U_SOURCES[0]["ua"]  # 假设所有源使用相同的UA
+        response_time = measure_response_time(url, ua)
+        if response_time < MAX_RESPONSE_TIME:
+            sorted_channels.append((response_time, channel))
+    sorted_channels.sort(key=lambda x: x[0])
+    return [channel for _, channel in sorted_channels]
+
+
 def generate_m3u_output(channels):
     """生成M3U格式内容"""
     group_dict = defaultdict(list)
@@ -101,11 +128,13 @@ def generate_m3u_output(channels):
 
     output = ["#EXTM3U"]
     for group, items in ordered_groups:
-        for item in items:
+        sorted_items = sort_channels_by_response_time(items)
+        for item in sorted_items:
             output.append(item["meta"])
             output.append(item["url"])
     return "\n".join(output)
 
+
 def generate_txt_output(channels):
     """生成TXT格式内容（分组名称,频道名称,URL）"""
     txt_lines = []
@@ -113,61 +142,68 @@ def generate_txt_output(channels):
         # 提取分组名称
         group_match = re.search(r'group-title="([^"]+)"', channel["meta"])
         group = group_match.group(1) if group_match else "未知分组"
-        
+
         # 提取频道名称（最后一个逗号后的内容）
         channel_name = re.split(r',(?![^"]*\"\,)', channel["meta"])[-1].strip()
-        
+
         # 清洗频道名称
         for char in DELETE_CHARS:
             channel_name = channel_name.replace(char, "")
-        
+
         # 添加条目
         txt_lines.append(f"{group},{channel_name},{channel['url']}")
-    
+
     return "\n".join(txt_lines)
 
+
 def save_file(content, filename):
     """通用文件保存函数"""
+    # 创建 live 文件夹，如果不存在
+    if not os.path.exists('live'):
+        os.makedirs('live')
     try:
-        with open(filename, "w", encoding="utf-8") as f:
+        file_path = os.path.join('live', filename)
+        with open(file_path, "w", encoding="utf-8") as f:
             f.write(content)
-        print(f"✅ 成功生成 {filename} 文件")
+        print(f"✅ 成功生成 {file_path} 文件")
         return True
     except PermissionError:
-        print(f"❌ 无写入权限: {filename}")
+        print(f"❌ 无写入权限: {file_path}")
     except Exception as e:
         print(f"❌ 保存文件失败: {str(e)}")
     return False
 
+
 def main():
     all_channels = []
-    
+
     print("开始下载和处理数据源...")
     for source in M3U_SOURCES:
         try:
             content = robust_download(source["url"], source["ua"])
             channels = parse_m3u(content)
-            
+
             processed = []
             for ch in channels:
                 if cleaned_meta := process_channel(ch["meta"]):
                     processed.append({"meta": cleaned_meta, "url": ch["url"]})
-            
+
             all_channels.extend(processed)
             print(f"[✓] {source['name']} 处理完成 ({len(processed)} 频道)")
         except Exception as e:
             print(f"[×] {source['name']} 失败: {str(e)}")
-    
+
     print("\n生成最终文件...")
     # 生成M3U文件
     m3u_content = generate_m3u_output(all_channels)
     save_file(m3u_content, "live.m3u")
-    
+
     # 生成TXT文件
     txt_content = generate_txt_output(all_channels)
     save_file(txt_content, "live.txt")
-    
+
     print(f"\n处理完成！有效频道总数: {len(all_channels)}")
 
+
 if __name__ == "__main__":
     main()