diff --git a/nonebot/__init__.py b/nonebot/__init__.py
index a796b53c..604f7326 100644
--- a/nonebot/__init__.py
+++ b/nonebot/__init__.py
@@ -199,8 +199,12 @@ def init(*, _env_file: Optional[str] = None, **kwargs):
         logger.opt(colors=True).debug(
             f"Loaded <y><b>Config</b></y>: {escape_tag(str(config.dict()))}")
 
-        DriverClass: Type[Driver] = getattr(
-            importlib.import_module(config.driver), "Driver")
+        modulename, _, cls = config.driver.partition(":")
+        module = importlib.import_module(modulename)
+        instance = module
+        for attr_str in (cls or "Driver").split("."):
+            instance = getattr(instance, attr_str)
+        DriverClass: Type[Driver] = instance  # type: ignore
         _driver = DriverClass(env, config)
 
 
diff --git a/nonebot/config.py b/nonebot/config.py
index ae82a3b6..732146df 100644
--- a/nonebot/config.py
+++ b/nonebot/config.py
@@ -144,6 +144,8 @@ class Config(BaseConfig):
     :说明:
 
       NoneBot 运行所使用的 ``Driver`` 。继承自 ``nonebot.driver.BaseDriver`` 。
+
+      配置格式为 ``<module>[:<class>]``，默认类名为 ``Driver``。
     """
     host: IPvAnyAddress = IPv4Address("127.0.0.1")  # type: ignore
     """