diff --git a/docs/api/plugin.md b/docs/api/plugin.md
index 7aeeabc9..42cdf84f 100644
--- a/docs/api/plugin.md
+++ b/docs/api/plugin.md
@@ -346,6 +346,50 @@ sidebarDepth: 0
 
 
 
+## `on_keyword(keywords, rule=None, **kwargs)`
+
+
+* **说明**
+
+    注册一个消息事件响应器，并且当消息纯文本部分包含关键词时响应。
+
+
+
+* **参数**
+
+    
+    * `keywords: Set[str]`: 关键词列表
+
+
+    * `rule: Optional[Union[Rule, RuleChecker]]`: 事件响应规则
+
+
+    * `permission: Optional[Permission]`: 事件响应权限
+
+
+    * `handlers: Optional[List[Handler]]`: 事件处理函数列表
+
+
+    * `temp: bool`: 是否为临时事件响应器（仅执行一次）
+
+
+    * `priority: int`: 事件响应器优先级
+
+
+    * `block: bool`: 是否阻止事件向更低优先级传递
+
+
+    * `state: Optional[dict]`: 默认的 state
+
+
+
+* **返回**
+
+    
+    * `Type[Matcher]`
+
+
+
 ## `on_command(cmd, rule=None, aliases=None, **kwargs)`
 
 
diff --git a/docs/api/rule.md b/docs/api/rule.md
index 9142ce2e..dade2a5b 100644
--- a/docs/api/rule.md
+++ b/docs/api/rule.md
@@ -123,7 +123,7 @@ Rule(async_function, run_sync(sync_function))
 
 
 
-## `keyword(msg)`
+## `keyword(*keywords)`
 
 
 * **说明**
@@ -135,7 +135,7 @@ Rule(async_function, run_sync(sync_function))
 * **参数**
 
     
-    * `msg: str`: 关键词
+    * `*keywords: str`: 关键词
 
 
 
@@ -175,7 +175,9 @@ Rule(async_function, run_sync(sync_function))
 
 * **说明**
 
-    根据正则表达式进行匹配
+    根据正则表达式进行匹配。
+
+    可以通过 `state["_matched"]` 获取正则表达式匹配成功的文本。
 
 
 
diff --git a/nonebot/plugin.py b/nonebot/plugin.py
index b0196bd2..32be4dbc 100644
--- a/nonebot/plugin.py
+++ b/nonebot/plugin.py
@@ -16,7 +16,7 @@ from nonebot.log import logger
 from nonebot.matcher import Matcher
 from nonebot.permission import Permission
 from nonebot.typing import Handler, RuleChecker
-from nonebot.rule import Rule, startswith, endswith, command, regex
+from nonebot.rule import Rule, startswith, endswith, keyword, command, regex
 from nonebot.typing import Any, Set, List, Dict, Type, Tuple, Union, Optional, ModuleType
 
 plugins: Dict[str, "Plugin"] = {}
@@ -232,8 +232,7 @@ def on_startswith(msg: str,
     :返回:
       - ``Type[Matcher]``
     """
-    return on_message(startswith(msg) & rule, **kwargs) if rule else on_message(
-        startswith(msg), **kwargs)
+    return on_message(startswith(msg) & rule, **kwargs)
 
 
 def on_endswith(msg: str,
@@ -254,8 +253,28 @@ def on_endswith(msg: str,
     :返回:
       - ``Type[Matcher]``
     """
-    return on_message(endswith(msg) & rule, **kwargs) if rule else on_message(
-        startswith(msg), **kwargs)
+    return on_message(endswith(msg) & rule, **kwargs)
+
+
+def on_keyword(keywords: Set[str],
+               rule: Optional[Union[Rule, RuleChecker]] = None,
+               **kwargs) -> Type[Matcher]:
+    """
+    :说明:
+      注册一个消息事件响应器，并且当消息纯文本部分包含关键词时响应。
+    :参数:
+      * ``keywords: Set[str]``: 关键词列表
+      * ``rule: Optional[Union[Rule, RuleChecker]]``: 事件响应规则
+      * ``permission: Optional[Permission]``: 事件响应权限
+      * ``handlers: Optional[List[Handler]]``: 事件处理函数列表
+      * ``temp: bool``: 是否为临时事件响应器（仅执行一次）
+      * ``priority: int``: 事件响应器优先级
+      * ``block: bool``: 是否阻止事件向更低优先级传递
+      * ``state: Optional[dict]``: 默认的 state
+    :返回:
+      - ``Type[Matcher]``
+    """
+    return on_message(keyword(*keywords) & rule, **kwargs)
 
 
 def on_command(cmd: Union[str, Tuple[str, ...]],
@@ -290,9 +309,7 @@ def on_command(cmd: Union[str, Tuple[str, ...]],
     handlers.insert(0, _strip_cmd)
 
     commands = set([cmd]) | (aliases or set())
-    return on_message(command(*commands) & rule, handlers=handlers, **
-                      kwargs) if rule else on_message(
-                          command(*commands), handlers=handlers, **kwargs)
+    return on_message(command(*commands) & rule, handlers=handlers, **kwargs)
 
 
 def on_regex(pattern: str,
@@ -317,9 +334,7 @@ def on_regex(pattern: str,
     :返回:
       - ``Type[Matcher]``
     """
-    return on_message(regex(pattern, flags) &
-                      rule, **kwargs) if rule else on_message(
-                          regex(pattern, flags), **kwargs)
+    return on_message(regex(pattern, flags) & rule, **kwargs)
 
 
 class CommandGroup:
diff --git a/nonebot/plugin.pyi b/nonebot/plugin.pyi
index dbd96365..6cf93b97 100644
--- a/nonebot/plugin.pyi
+++ b/nonebot/plugin.pyi
@@ -69,8 +69,8 @@ def on_request(rule: Optional[Union[Rule, RuleChecker]] = ...,
 
 def on_startswith(msg: str,
                   rule: Optional[Optional[Union[Rule, RuleChecker]]] = ...,
-                  permission: Optional[Permission] = ...,
                   *,
+                  permission: Optional[Permission] = ...,
                   handlers: Optional[List[Handler]] = ...,
                   temp: bool = ...,
                   priority: int = ...,
@@ -81,8 +81,8 @@ def on_startswith(msg: str,
 
 def on_endswith(msg: str,
                 rule: Optional[Optional[Union[Rule, RuleChecker]]] = ...,
-                permission: Optional[Permission] = ...,
                 *,
+                permission: Optional[Permission] = ...,
                 handlers: Optional[List[Handler]] = ...,
                 temp: bool = ...,
                 priority: int = ...,
@@ -91,11 +91,23 @@ def on_endswith(msg: str,
     ...
 
 
+def on_keyword(keywords: Set[str],
+               rule: Optional[Optional[Union[Rule, RuleChecker]]] = ...,
+               *,
+               permission: Optional[Permission] = ...,
+               handlers: Optional[List[Handler]] = ...,
+               temp: bool = ...,
+               priority: int = ...,
+               block: bool = ...,
+               state: Optional[dict] = ...) -> Type[Matcher]:
+    ...
+
+
 def on_command(cmd: Union[str, Tuple[str, ...]],
                rule: Optional[Union[Rule, RuleChecker]] = ...,
                aliases: Optional[Set[Union[str, Tuple[str, ...]]]] = ...,
-               permission: Optional[Permission] = ...,
                *,
+               permission: Optional[Permission] = ...,
                handlers: Optional[List[Handler]] = ...,
                temp: bool = ...,
                priority: int = ...,
@@ -107,8 +119,8 @@ def on_command(cmd: Union[str, Tuple[str, ...]],
 def on_regex(pattern: str,
              flags: Union[int, re.RegexFlag] = 0,
              rule: Optional[Rule] = ...,
-             permission: Optional[Permission] = ...,
              *,
+             permission: Optional[Permission] = ...,
              handlers: Optional[List[Handler]] = ...,
              temp: bool = ...,
              priority: int = ...,
diff --git a/nonebot/rule.py b/nonebot/rule.py
index c950c449..faefbd76 100644
--- a/nonebot/rule.py
+++ b/nonebot/rule.py
@@ -182,16 +182,17 @@ def endswith(msg: str) -> Rule:
     return Rule(_endswith)
 
 
-def keyword(msg: str) -> Rule:
+def keyword(*keywords: str) -> Rule:
     """
     :说明:
       匹配消息关键词
     :参数:
-      * ``msg: str``: 关键词
+      * ``*keywords: str``: 关键词
     """
 
     async def _keyword(bot: Bot, event: Event, state: dict) -> bool:
-        return bool(event.plain_text and msg in event.plain_text)
+        return bool(event.plain_text and
+                    any(keyword in event.plain_text for keyword in keywords))
 
     return Rule(_keyword)
 
@@ -240,7 +241,7 @@ def regex(regex: str, flags: Union[int, re.RegexFlag] = 0) -> Rule:
     """
     :说明:
       根据正则表达式进行匹配。
-      
+
       可以通过 ``state["_matched"]`` 获取正则表达式匹配成功的文本。
     :参数:
       * ``regex: str``: 正则表达式
@@ -261,6 +262,7 @@ def regex(regex: str, flags: Union[int, re.RegexFlag] = 0) -> Rule:
         else:
             state["_matched"] = None
             return False
+
     return Rule(_regex)