diff --git a/nonebot/adapters/mirai/__init__.py b/nonebot/adapters/mirai/__init__.py
index 1107af38..b209657e 100644
--- a/nonebot/adapters/mirai/__init__.py
+++ b/nonebot/adapters/mirai/__init__.py
@@ -1,3 +1,13 @@
+"""
+Mirai-API-HTTP 协议适配
+============================
+
+协议详情请看: `mirai-api-http 文档`_ 
+
+.. mirai-api-http 文档:
+    https://github.com/project-mirai/mirai-api-http/tree/master/docs
+"""
+
 from .bot import MiraiBot
 from .bot_ws import MiraiWebsocketBot
 from .event import *
diff --git a/nonebot/adapters/mirai/bot.py b/nonebot/adapters/mirai/bot.py
index ee718997..74c4f602 100644
--- a/nonebot/adapters/mirai/bot.py
+++ b/nonebot/adapters/mirai/bot.py
@@ -32,6 +32,7 @@ class ActionFailed(BaseActionFailed):
 
 
 class SessionManager:
+    """Bot会话管理器, 提供API主动调用接口"""
     sessions: Dict[int, Tuple[str, datetime, httpx.AsyncClient]] = {}
     session_expiry: timedelta = timedelta(minutes=15)
 
@@ -40,19 +41,39 @@ class SessionManager:
 
     @staticmethod
     def _raise_code(data: Dict[str, Any]) -> Dict[str, Any]:
-        code = data.get('code', 0)
-        logger.opt(colors=True).debug('Mirai API returned data: '
-                                      f'<y>{escape_tag(str(data))}</y>')
-        if code != 0:
-            raise ActionFailed(**data)
+        logger.opt(colors=True).debug(
+            f'Mirai API returned data: <y>{escape_tag(str(data))}</y>')
+        if isinstance(data, dict) and ('code' in data):
+            if data['code'] != 0:
+                raise ActionFailed(**data)
         return data
 
     async def post(self,
                    path: str,
                    *,
                    params: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
-        params = {**(params or {}), 'sessionKey': self.session_key}
-        response = await self.client.post(path, json=params, timeout=3)
+        """
+        :说明:
+
+          以POST方式主动提交API请求
+
+        :参数:
+
+          * ``path: str``: 对应API路径
+          * ``params: Optional[Dict[str, Any]]``: 请求参数 (无需sessionKey)
+
+        :返回:
+
+          - ``Dict[str, Any]``: API 返回值
+        """
+        response = await self.client.post(
+            path,
+            json={
+                **(params or {}),
+                'sessionKey': self.session_key,
+            },
+            timeout=3,
+        )
         response.raise_for_status()
         return self._raise_code(response.json())
 
@@ -61,12 +82,28 @@ class SessionManager:
                       *,
                       params: Optional[Dict[str,
                                             Any]] = None) -> Dict[str, Any]:
-        response = await self.client.get(path,
-                                         params={
-                                             **(params or {}), 'sessionKey':
-                                                 self.session_key
-                                         },
-                                         timeout=3)
+        """
+        :说明:
+
+          以GET方式主动提交API请求
+
+        :参数:
+
+          * ``path: str``: 对应API路径
+          * ``params: Optional[Dict[str, Any]]``: 请求参数 (无需sessionKey)
+
+        :返回:
+
+          - ``Dict[str, Any]``: API 返回值
+        """
+        response = await self.client.get(
+            path,
+            params={
+                **(params or {}),
+                'sessionKey': self.session_key,
+            },
+            timeout=3,
+        )
         response.raise_for_status()
         return self._raise_code(response.json())
 
@@ -108,11 +145,11 @@ class SessionManager:
         return cls(session_key, client)
 
     @classmethod
-    def get(cls, self_id: int):
+    def get(cls, self_id: int, check_expire: bool = True):
         if self_id not in cls.sessions:
             return None
         key, time, client = cls.sessions[self_id]
-        if datetime.now() - time > cls.session_expiry:
+        if check_expire and (datetime.now() - time > cls.session_expiry):
             return None
         return cls(key, client)
 
@@ -129,7 +166,6 @@ class MiraiBot(BaseBot):
                  *,
                  websocket: Optional[WebSocket] = None):
         super().__init__(connection_type, self_id, websocket=websocket)
-        self.api = SessionManager.get(int(self_id))
 
     @property
     @overrides(BaseBot)
@@ -140,6 +176,13 @@ class MiraiBot(BaseBot):
     def alive(self) -> bool:
         return not self.websocket.closed
 
+    @property
+    def api(self) -> SessionManager:
+        """返回该Bot对象的会话管理实例以提供API主动调用"""
+        api = SessionManager.get(self_id=int(self.self_id))
+        assert api is not None, 'SessionManager has not been initialized'
+        return api
+
     @classmethod
     @overrides(BaseBot)
     async def check_permission(cls, driver: "Driver", connection_type: str,
@@ -179,10 +222,12 @@ class MiraiBot(BaseBot):
 
     @overrides(BaseBot)
     async def call_api(self, api: str, **data) -> NoReturn:
+        """由于Mirai的HTTP API特殊性, 该API暂时无法实现"""
         raise NotImplementedError
 
     @overrides(BaseBot)
     def __getattr__(self, key: str) -> NoReturn:
+        """由于Mirai的HTTP API特殊性, 该API暂时无法实现"""
         raise NotImplementedError
 
     @overrides(BaseBot)
diff --git a/nonebot/adapters/mirai/bot_ws.py b/nonebot/adapters/mirai/bot_ws.py
index 560534b6..ccce63b3 100644
--- a/nonebot/adapters/mirai/bot_ws.py
+++ b/nonebot/adapters/mirai/bot_ws.py
@@ -107,6 +107,12 @@ class MiraiWebsocketBot(MiraiBot):
     def alive(self) -> bool:
         return not self.websocket.closed
 
+    @property
+    def api(self) -> SessionManager:
+        api = SessionManager.get(self_id=int(self.self_id), check_expire=False)
+        assert api is not None, 'SessionManager has not been initialized'
+        return api
+
     @classmethod
     @overrides(MiraiBot)
     async def check_permission(cls, driver: "Driver", connection_type: str,
@@ -118,12 +124,23 @@ class MiraiWebsocketBot(MiraiBot):
     @classmethod
     @overrides(MiraiBot)
     def register(cls, driver: "Driver", config: "Config", qq: int):
-        cls.mirai_config = MiraiConfig(**config.dict())
-        cls.active = True
-        assert cls.mirai_config.auth_key is not None
-        assert cls.mirai_config.host is not None
-        assert cls.mirai_config.port is not None
+        """
+        :说明:
+
+          注册该Adapter 
+
+        :参数:
+
+          * ``driver: Driver``: 程序所使用的``Driver``
+          * ``config: Config``: 程序配置对象
+          * ``qq: int``: 要使用的Bot的QQ号 **注意: 在使用正向Websocket时必须指定该值!**
+
+        :返回:
+
+          - ``[type]``: [description]
+        """
         super().register(driver, config)
+        cls.active = True
 
         async def _bot_connection():
             session: SessionManager = await SessionManager.new(
diff --git a/nonebot/adapters/mirai/config.py b/nonebot/adapters/mirai/config.py
index 942cf9fa..a907dd17 100644
--- a/nonebot/adapters/mirai/config.py
+++ b/nonebot/adapters/mirai/config.py
@@ -5,6 +5,15 @@ from pydantic import BaseModel, Extra, Field
 
 
 class Config(BaseModel):
+    """
+    Mirai 配置类
+
+    :必填:
+
+      - ``mirai_auth_key``: mirai-api-http的auth_key
+      - ``mirai_host``: mirai-api-http的地址
+      - ``mirai_port``: mirai-api-http的端口
+    """
     auth_key: Optional[str] = Field(None, alias='mirai_auth_key')
     host: Optional[IPv4Address] = Field(None, alias='mirai_host')
     port: Optional[int] = Field(None, alias='mirai_port')
diff --git a/nonebot/adapters/mirai/event/__init__.py b/nonebot/adapters/mirai/event/__init__.py
index 8b96ecca..c0024e19 100644
--- a/nonebot/adapters/mirai/event/__init__.py
+++ b/nonebot/adapters/mirai/event/__init__.py
@@ -1,3 +1,10 @@
+"""
+\:\:\:warning 警告
+事件中为了使代码更加整洁, 我们采用了与PEP8相符的命名规则取代Mirai原有的驼峰命名
+
+部分字段可能与文档在符号上不一致
+\:\:\:
+"""
 from .base import Event, GroupChatInfo, GroupInfo, UserPermission, PrivateChatInfo
 from .message import *
 from .notice import *
diff --git a/nonebot/adapters/mirai/event/base.py b/nonebot/adapters/mirai/event/base.py
index 5b1cf7fc..662b856d 100644
--- a/nonebot/adapters/mirai/event/base.py
+++ b/nonebot/adapters/mirai/event/base.py
@@ -45,9 +45,9 @@ class PrivateChatInfo(BaseModel):
 
 class Event(BaseEvent):
     """
-    mirai-api-http 协议事件，字段与 mirai-api-http 一致。各事件字段参考 `mirai-api-http 文档`_
+    mirai-api-http 协议事件，字段与 mirai-api-http 一致。各事件字段参考 `mirai-api-http 事件类型`_
 
-    .. _mirai-api-http 文档:
+    .. _mirai-api-http 事件类型:
         https://github.com/project-mirai/mirai-api-http/blob/master/docs/EventType.md
     """
     self_id: int
diff --git a/nonebot/adapters/mirai/event/request.py b/nonebot/adapters/mirai/event/request.py
index cea13aae..18d466ee 100644
--- a/nonebot/adapters/mirai/event/request.py
+++ b/nonebot/adapters/mirai/event/request.py
@@ -55,10 +55,6 @@ class NewFriendRequestEvent(RequestEvent):
             - ``1``: 拒绝添加好友
             - ``2``: 拒绝添加好友并添加黑名单，不再接收该用户的好友申请
           * ``message: str``: 回复的信息
-
-        :返回:
-
-          - ``[type]``: [description]
         """
         assert operate > 0
         return await bot.api.post('/resp/newFriendRequestEvent',
diff --git a/nonebot/adapters/mirai/message.py b/nonebot/adapters/mirai/message.py
index a577a807..265b3b3b 100644
--- a/nonebot/adapters/mirai/message.py
+++ b/nonebot/adapters/mirai/message.py
@@ -9,6 +9,7 @@ from nonebot.typing import overrides
 
 
 class MessageType(str, Enum):
+    """消息类型枚举类"""
     SOURCE = 'Source'
     QUOTE = 'Quote'
     AT = 'At'
@@ -25,6 +26,13 @@ class MessageType(str, Enum):
 
 
 class MessageSegment(BaseMessageSegment):
+    """
+    CQHTTP 协议 MessageSegment 适配。具体方法参考 `mirai-api-http 消息类型`_
+
+    .. _mirai-api-http 消息类型:
+        https://github.com/project-mirai/mirai-api-http/blob/master/docs/MessageType.md
+    """
+
     type: MessageType
     data: Dict[str, Any]
 
@@ -59,6 +67,7 @@ class MessageSegment(BaseMessageSegment):
         return self.type == MessageType.PLAIN
 
     def as_dict(self) -> Dict[str, Any]:
+        """导出可以被正常json序列化的结构体"""
         return {'type': self.type.value, **self.data}
 
     @classmethod
@@ -68,6 +77,19 @@ class MessageSegment(BaseMessageSegment):
     @classmethod
     def quote(cls, id: int, group_id: int, sender_id: int, target_id: int,
               origin: "MessageChain"):
+        """
+        :说明:
+
+          生成回复引用消息段 
+
+        :参数:
+
+          * ``id: int``: 被引用回复的原消息的message_id
+          * ``group_id: int``: 被引用回复的原消息所接收的群号，当为好友消息时为0
+          * ``sender_id: int``: 被引用回复的原消息的发送者的QQ号
+          * ``target_id: int``: 被引用回复的原消息的接收者者的QQ号（或群号）
+          * ``origin: MessageChain``: 被引用回复的原消息的消息链对象
+        """
         return cls(type=MessageType.QUOTE,
                    id=id,
                    groupId=group_id,
@@ -77,18 +99,51 @@ class MessageSegment(BaseMessageSegment):
 
     @classmethod
     def at(cls, target: int):
+        """
+        :说明:
+
+          @某个人 
+
+        :参数:
+
+          * ``target: int``: 群员QQ号
+        """
         return cls(type=MessageType.AT, target=target)
 
     @classmethod
     def at_all(cls):
+        """
+        :说明:
+
+          @全体成员
+        """
         return cls(type=MessageType.AT_ALL)
 
     @classmethod
     def face(cls, face_id: Optional[int] = None, name: Optional[str] = None):
+        """
+        :说明:
+
+          发送QQ表情 
+        
+        :参数:
+
+          * ``face_id: Optional[int]``: QQ表情编号，可选，优先高于name
+          * ``name: Optional[str]``: QQ表情拼音，可选
+        """
         return cls(type=MessageType.FACE, faceId=face_id, name=name)
 
     @classmethod
     def plain(cls, text: str):
+        """
+        :说明:
+
+          纯文本消息 
+
+        :参数:
+
+          * ``text: str``: 文字消息
+        """
         return cls(type=MessageType.PLAIN, text=text)
 
     @classmethod
@@ -96,6 +151,21 @@ class MessageSegment(BaseMessageSegment):
               image_id: Optional[str] = None,
               url: Optional[str] = None,
               path: Optional[str] = None):
+        """
+        :说明:
+
+          图片消息 
+        
+        :参数:
+
+          * ``image_id: Optional[str]``: 图片的image_id，群图片与好友图片格式不同。不为空时将忽略url属性
+          * ``url: Optional[str]``: 图片的URL，发送时可作网络图片的链接
+          * ``path: Optional[str]``: 图片的路径，发送本地图片
+
+        :返回:
+
+          - ``[type]``: [description]
+        """
         return cls(type=MessageType.IMAGE, imageId=image_id, url=url, path=path)
 
     @classmethod
@@ -103,6 +173,15 @@ class MessageSegment(BaseMessageSegment):
                     image_id: Optional[str] = None,
                     url: Optional[str] = None,
                     path: Optional[str] = None):
+        """
+        :说明:
+
+          闪照消息 
+        
+        :参数:
+          
+          同 ``image``
+        """
         return cls(type=MessageType.FLASH_IMAGE,
                    imageId=image_id,
                    url=url,
@@ -113,6 +192,17 @@ class MessageSegment(BaseMessageSegment):
               voice_id: Optional[str] = None,
               url: Optional[str] = None,
               path: Optional[str] = None):
+        """
+        :说明:
+
+          语音消息
+
+        :参数: 
+
+          * ``voice_id: Optional[str]``: 语音的voice_id，不为空时将忽略url属性
+          * ``url: Optional[str]``: 语音的URL，发送时可作网络语音的链接
+          * ``path: Optional[str]``: 语音的路径，发送本地语音
+        """
         return cls(type=MessageType.FLASH_IMAGE,
                    imageId=voice_id,
                    url=url,
@@ -120,22 +210,69 @@ class MessageSegment(BaseMessageSegment):
 
     @classmethod
     def xml(cls, xml: str):
+        """
+        :说明:
+
+          XML消息 
+
+        :参数:
+
+          * ``xml: str``: XML文本
+        """
         return cls(type=MessageType.XML, xml=xml)
 
     @classmethod
     def json(cls, json: str):
+        """
+        :说明:
+
+          Json消息 
+
+        :参数:
+
+          * ``json: str``: Json文本
+        """
         return cls(type=MessageType.JSON, json=json)
 
     @classmethod
     def app(cls, content: str):
+        """
+        :说明:
+
+          应用程序消息 
+
+        :参数:
+
+          * ``content: str``: 内容
+        """
         return cls(type=MessageType.APP, content=content)
 
     @classmethod
     def poke(cls, name: str):
+        """
+        :说明:
+
+          戳一戳消息 
+
+        :参数:
+
+          * ``name: str``: 戳一戳的类型
+            - "Poke": 戳一戳
+            - "ShowLove": 比心
+            - "Like": 点赞
+            - "Heartbroken": 心碎
+            - "SixSixSix": 666
+            - "FangDaZhao": 放大招
+        """
         return cls(type=MessageType.POKE, name=name)
 
 
-class MessageChain(BaseMessage):  #type:List[MessageSegment]
+class MessageChain(BaseMessage):
+    """
+    Mirai 协议 Messaqge 适配
+    
+    由于Mirai协议的Message实现较为特殊, 故使用MessageChain命名
+    """
 
     @overrides(BaseMessage)
     def __init__(self, message: Union[List[Dict[str, Any]],
@@ -166,6 +303,7 @@ class MessageChain(BaseMessage):  #type:List[MessageSegment]
         ]
 
     def export(self) -> List[Dict[str, Any]]:
+        """导出为可以被正常json序列化的数组"""
         return [
             *map(lambda segment: segment.as_dict(), self.copy())  # type: ignore
         ]