diff --git a/src/common/database.py b/src/common/database.py
index a3e5b4e3b..ee0ead0bd 100644
--- a/src/common/database.py
+++ b/src/common/database.py
@@ -15,9 +15,16 @@ def __create_database_instance():
     password = os.getenv("MONGODB_PASSWORD")
     auth_source = os.getenv("MONGODB_AUTH_SOURCE")
 
-    if uri and uri.startswith("mongodb://"):
-        # 优先使用URI连接
-        return MongoClient(uri)
+    if uri:
+        # 支持标准mongodb://和mongodb+srv://连接字符串
+        if uri.startswith(("mongodb://", "mongodb+srv://")):
+            return MongoClient(uri)
+        else:
+            raise ValueError(
+                "Invalid MongoDB URI format. URI must start with 'mongodb://' or 'mongodb+srv://'. "
+                "For MongoDB Atlas, use 'mongodb+srv://' format. "
+                "See: https://www.mongodb.com/docs/manual/reference/connection-string/"
+            )
 
     if username and password:
         # 如果有用户名和密码，使用认证连接