diff --git a/executor.py b/executor.py
index 060e8d85..d22f50e7 100644
--- a/executor.py
+++ b/executor.py
@@ -66,17 +66,37 @@ def is_github_folder_url(url):
     return url.startswith('https://raw.githubusercontent.com/') and '.' not in os.path.basename(url)
 
 
-def get_github_repo_contents(repo_url):
-    response = requests.get(repo_url)
+def get_branch_head_sha(owner, repo, branch):
+    url = f"https://api.github.com/repos/{owner}/{repo}/git/ref/heads/{branch}"
+    response = requests.get(url)
+    data = response.json()
+    sha = data['object']['sha']
+    return sha
 
-    filenames = []
-    if response.status_code == 200:
-        contents = response.json()
-        for item in contents['payload']['tree']['items']:
-            filenames.append(item['name'])
-    else:
-        print(f"Failed to fetch contents. Status code: {response.status_code}")
-    return filenames
+def get_github_repo_contents(repo_url):
+    # repo_url example: https://raw.githubusercontent.com/wxywb/history_rag/master/data/history_24/
+    repo_owner = repo_url.split('/')[3]
+    repo_name = repo_url.split('/')[4]
+    branch = repo_url.split('/')[5]
+    folder_path = '/'.join(repo_url.split('/')[6:])
+    sha = get_branch_head_sha(repo_owner, repo_name, branch)
+    url = f"https://api.github.com/repos/{repo_owner}/{repo_name}/git/trees/{sha}?recursive=1"
+    try:
+        response = requests.get(url)
+        if response.status_code == 200:
+            data = response.json()
+
+            raw_urls = []
+            for file in data['tree']:
+                if file['path'].startswith(folder_path) and file['path'].endswith('.txt'):
+                    raw_url = f"https://raw.githubusercontent.com/{repo_owner}/{repo_name}/{branch}/{file['path']}"
+                    raw_urls.append(raw_url)
+            return raw_urls
+        else:
+            print(f"Failed to fetch contents. Status code: {response.status_code}")
+    except Exception as e:
+        print(f"Failed to fetch contents. Error: {str(e)}")
+    return []
 
 class Executor:
     def __init__(self, model):
@@ -109,7 +129,7 @@ def __init__(self, config):
         embed_model = HuggingFaceEmbedding(model_name=config.embedding.name)
 
         # 使用Qwen 通义千问模型
-        if config.llm.name == "qwen":
+        if config.llm.name.find("qwen") != -1:
             llm = QwenUnofficial(temperature=config.llm.temperature, model=config.llm.name, max_tokens=2048)
         elif config.llm.name.find("gemini") != -1:
             llm = Gemini(temperature=config.llm.temperature, model_name=config.llm.name, max_tokens=2048)
@@ -236,7 +256,7 @@ def __init__(self, config):
         self.config = config
         self._debug = False
 
-        if config.llm.name == "qwen":
+        if config.llm.name.find("qwen") != -1:
             llm = QwenUnofficial(temperature=config.llm.temperature, model=config.llm.name, max_tokens=2048)
         elif config.llm.name.find("gemini") != -1:
             llm = Gemini(model_name=config.llm.name, temperature=config.llm.temperature, max_tokens=2048)
@@ -296,10 +316,10 @@ def build_index(self, path, overwrite):
             self._initialize_pipeline(self.service_context)
 
         if is_github_folder_url(path):
-            filenames = get_github_repo_contents(path)
-            for filename in filenames:
-                if filename.endswith('txt'):
-                    self.build_index(self, path + f'/{filename}') 
+            urls = get_github_repo_contents(path)
+            for url in urls:
+                print(f'(rag) 正在构建索引 {url}')
+                self.build_index(url, False)  # already deleted original collection
         elif path.endswith('.txt'):
             self.index.insert_doc_url(
                 url=path,