diff --git a/docs/start/initialization.rst b/docs/start/initialization.rst
index 32c17ff837..eaf80f4a5f 100644
--- a/docs/start/initialization.rst
+++ b/docs/start/initialization.rst
@@ -77,7 +77,8 @@ Besides `provider_uri` and `region`, `qlib.init` has other parameters. The follo
         })
 - `mongo`
     Type: dict, optional parameter, the setting of `MongoDB <https://www.mongodb.com/>`_ which will be used in some features such as `Task Management <../advanced/task_management.html>`_, with high performance and clustered processing. 
-    Users need finished `installation <https://www.mongodb.com/try/download/community>`_ firstly, and run it in a fixed URL.
+    Users need to follow the steps in  `installation <https://www.mongodb.com/try/download/community>`_  to install MongoDB firstly and then access it via a URI.
+    Users can access mongodb with credential by setting "task_url"  to a string like `"mongodb://%s:%s@%s" % (user, pwd, host + ":" + port)`.
 
     .. code-block:: Python