diff --git a/src/nonebot_plugin_alconna/__init__.py b/src/nonebot_plugin_alconna/__init__.py
index 710bdc3..ecc856c 100644
--- a/src/nonebot_plugin_alconna/__init__.py
+++ b/src/nonebot_plugin_alconna/__init__.py
@@ -89,7 +89,7 @@
 from .consts import ALCONNA_EXEC_RESULT as ALCONNA_EXEC_RESULT
 from .extension import add_global_extension as add_global_extension
 
-__version__ = "0.30.6"
+__version__ = "0.30.7"
 
 __plugin_meta__ = PluginMetadata(
     name="Alconna 插件",
diff --git a/src/nonebot_plugin_alconna/extension.py b/src/nonebot_plugin_alconna/extension.py
index 4531c6c..8b8bdd8 100644
--- a/src/nonebot_plugin_alconna/extension.py
+++ b/src/nonebot_plugin_alconna/extension.py
@@ -40,6 +40,7 @@ class Extension(metaclass=ABCMeta):
 
     def __init_subclass__(cls, **kwargs):
         cls._overrides = {
+            "output_converter": cls.output_converter != Extension.output_converter,
             "send_wrapper": cls.send_wrapper != Extension.send_wrapper,
             "receive_wrapper": cls.receive_wrapper != Extension.receive_wrapper,
             "permission_check": cls.permission_check != Extension.permission_check,
@@ -184,10 +185,14 @@ def select(self, bot: Bot, event: Event) -> Self:
     async def output_converter(self, output_type: OutputType, content: str) -> Message | UniMessage:
         exc = None
         for ext in self.context:
+            if not ext._overrides["output_converter"]:
+                continue
             try:
                 return await ext.output_converter(output_type, content)
             except Exception as e:
                 exc = e
+        if not exc:
+            return FallbackMessage()
         raise exc  # type: ignore
 
     async def message_provider(
diff --git a/src/nonebot_plugin_alconna/rule.py b/src/nonebot_plugin_alconna/rule.py
index c1ec8d8..dd1f139 100644
--- a/src/nonebot_plugin_alconna/rule.py
+++ b/src/nonebot_plugin_alconna/rule.py
@@ -249,6 +249,8 @@ async def __call__(self, event: Event, state: T_State, bot: Bot) -> bool:
                 arp = Arparma(self.command.path, msg, False, error_info=e)
             may_help_text: Optional[str] = cap.get("output", None)
         self._session = None
+        if not arp.head_matched:
+            return False
         if not arp.matched and not may_help_text and self.skip:
             log(
                 "TRACE",
@@ -288,6 +290,8 @@ async def send(self, text: str, bot: Bot, event: Event, arp: Arparma) -> Message
         _t = str(arp.error_info) if isinstance(arp.error_info, SpecialOptionTriggered) else "help"
         try:
             msg = await self.executor.output_converter(_t, text)  # type: ignore
+            if not msg:
+                return await bot.send(event, text)
             if isinstance(msg, UniMessage):
                 msg = await msg.export(bot, fallback=True)
             return await bot.send(event, msg)  # type: ignore
diff --git a/src/nonebot_plugin_alconna/uniseg/__init__.py b/src/nonebot_plugin_alconna/uniseg/__init__.py
index 0ecbb39..2a2e00f 100644
--- a/src/nonebot_plugin_alconna/uniseg/__init__.py
+++ b/src/nonebot_plugin_alconna/uniseg/__init__.py
@@ -24,7 +24,7 @@
 from .params import UniversalMessage as UniversalMessage
 from .params import UniversalSegment as UniversalSegment
 
-__version__ = "0.30.6"
+__version__ = "0.30.7"
 
 __plugin_meta__ = PluginMetadata(
     name="Universal Segment 插件",
diff --git a/tests/test_unmatch.py b/tests/test_unmatch.py
new file mode 100644
index 0000000..a75223f
--- /dev/null
+++ b/tests/test_unmatch.py
@@ -0,0 +1,39 @@
+from typing import Union
+
+import pytest
+from nonebug import App
+from nonebot import get_adapter
+from arclet.alconna import Args, Alconna
+from nonebot.adapters.onebot.v11 import Bot, Adapter, Message
+
+from tests.fake import fake_group_message_event_v11
+
+
+@pytest.mark.asyncio()
+async def test_unmatch(app: App):
+    from nonebot_plugin_alconna import At, Match, UniMessage, on_alconna
+
+    test_cmd = on_alconna(
+        Alconna("test", Args["target", Union[int, At]]), skip_for_unmatch=False, auto_send_output=True
+    )
+
+    @test_cmd.handle()
+    async def tt_h(target: Match[Union[int, At]]):
+        await test_cmd.send(UniMessage(["ok\n", str(target.result)]))
+
+    async with app.test_matcher(test_cmd) as ctx:
+        adapter = get_adapter(Adapter)
+        bot = ctx.create_bot(base=Bot, adapter=adapter)
+
+        event = fake_group_message_event_v11(message=Message("tes 1234"), user_id=123)
+        ctx.receive_event(bot, event)
+        ctx.should_not_pass_rule()
+
+        event = fake_group_message_event_v11(message=Message("test 1234"), user_id=123)
+        ctx.receive_event(bot, event)
+        ctx.should_call_send(event, Message("ok\n1234"))
+
+        event = fake_group_message_event_v11(message=Message("test abcd"), user_id=123)
+        ctx.receive_event(bot, event)
+        ctx.should_not_pass_rule()
+        ctx.should_call_send(event, "ParamsUnmatched('参数 abcd 不正确')", bot=bot)