diff --git a/src/plugins/nonebot_bison/post.py b/src/plugins/nonebot_bison/post.py
index d7c1cad..ceca521 100644
--- a/src/plugins/nonebot_bison/post.py
+++ b/src/plugins/nonebot_bison/post.py
@@ -24,7 +24,7 @@ class Post:
     pics: list[Union[str, bytes]] = field(default_factory=list)
     extra_msg: list[Message] = field(default_factory=list)
 
-    _message: Optional[list] = None
+    _message: Optional[list[Message]] = None
 
     def _use_pic(self):
         if not self.override_use_pic is None:
@@ -107,10 +107,10 @@ class Post:
         self.pics = self.pics[matrix[0] * matrix[1] :]
         self.pics.insert(0, target_io.getvalue())
 
-    async def generate_messages(self):
+    async def generate_messages(self) -> list[Message]:
         if self._message is None:
             await self._pic_merge()
-            msgs = []
+            msg_segments: list[MessageSegment] = []
             text = ""
             if self.text:
                 if self._use_pic():
@@ -123,20 +123,21 @@ class Post:
             if self.target_name:
                 text += " {}".format(self.target_name)
             if self._use_pic():
-                msgs.append(await parse_text(text))
+                msg_segments.append(await parse_text(text))
                 if not self.target_type == "rss" and self.url:
-                    msgs.append(MessageSegment.text(self.url))
+                    msg_segments.append(MessageSegment.text(self.url))
             else:
                 if self.url:
                     text += " \n详情: {}".format(self.url)
-                msgs.append(MessageSegment.text(text))
+                msg_segments.append(MessageSegment.text(text))
             for pic in self.pics:
-                # if isinstance(pic, bytes):
-                #     pic = 'base64://' + base64.b64encode(pic).decode()
-                # msgs.append(Message("[CQ:image,file={url}]".format(url=pic)))
-                msgs.append(MessageSegment.image(pic))
+                msg_segments.append(MessageSegment.image(pic))
             if self.compress:
-                msgs = [reduce(lambda x, y: x.append(y), msgs, Message())]
+                msgs = [reduce(lambda x, y: x.append(y), msg_segments, Message())]
+            else:
+                msgs = list(
+                    map(lambda msg_segment: Message([msg_segment]), msg_segments)
+                )
             msgs.extend(self.extra_msg)
             self._message = msgs
         assert len(self._message) > 0, f"message list empty, {self}"
diff --git a/src/plugins/nonebot_bison/send.py b/src/plugins/nonebot_bison/send.py
index 31f31f0..b744926 100644
--- a/src/plugins/nonebot_bison/send.py
+++ b/src/plugins/nonebot_bison/send.py
@@ -64,7 +64,9 @@ async def _send_msgs_dispatch(
         await _do_send(bot, user, user_type, msg)
 
 
-async def send_msgs(bot: Bot, user, user_type: Literal["private", "group"], msgs: list):
+async def send_msgs(
+    bot: Bot, user, user_type: Literal["private", "group"], msgs: list[Message]
+):
     if not plugin_config.bison_use_pic_merge or user_type == "private":
         for msg in msgs:
             await _send_msgs_dispatch(bot, user, user_type, msg)
diff --git a/tests/test_send.py b/tests/test_send.py
index dd2c089..20f5b98 100644
--- a/tests/test_send.py
+++ b/tests/test_send.py
@@ -1,13 +1,11 @@
-import asyncio
-
 import pytest
 from nonebug import App
 
 
 @pytest.mark.asyncio
 async def test_send_no_queue(app: App):
-    import nonebot
     from nonebot.adapters.onebot.v11.bot import Bot
+    from nonebot.adapters.onebot.v11.message import Message
     from nonebot_bison.plugin_config import plugin_config
     from nonebot_bison.send import send_msgs
 
@@ -16,16 +14,16 @@ async def test_send_no_queue(app: App):
         bot = ctx.create_bot(base=Bot)
         assert isinstance(bot, Bot)
         ctx.should_call_api(
-            "send_group_msg", {"group_id": "1233", "message": "msg1"}, True
+            "send_group_msg", {"group_id": "1233", "message": Message("msg1")}, True
         )
         ctx.should_call_api(
-            "send_group_msg", {"group_id": "1233", "message": "msg2"}, True
+            "send_group_msg", {"group_id": "1233", "message": Message("msg2")}, True
         )
         ctx.should_call_api(
-            "send_private_msg", {"user_id": "666", "message": "priv"}, True
+            "send_private_msg", {"user_id": "666", "message": Message("priv")}, True
         )
-        await send_msgs(bot, "1233", "group", ["msg1", "msg2"])
-        await send_msgs(bot, "666", "private", ["priv"])
+        await send_msgs(bot, "1233", "group", [Message("msg1"), Message("msg2")])
+        await send_msgs(bot, "666", "private", [Message("priv")])
         assert ctx.wait_list.empty()
 
 
@@ -33,9 +31,10 @@ async def test_send_no_queue(app: App):
 async def test_send_queue(app: App):
     import nonebot
     from nonebot.adapters.onebot.v11.bot import Bot
+    from nonebot.adapters.onebot.v11.message import Message
     from nonebot_bison import send
     from nonebot_bison.plugin_config import plugin_config
-    from nonebot_bison.send import LAST_SEND_TIME, do_send_msgs, send_msgs
+    from nonebot_bison.send import do_send_msgs, send_msgs
 
     async with app.test_api() as ctx:
         new_bot = ctx.create_bot(base=Bot)
@@ -48,7 +47,7 @@ async def test_send_queue(app: App):
             "send_group_msg", {"group_id": "1233", "message": "test msg"}, True
         )
         await bot.call_api("send_group_msg", group_id="1233", message="test msg")
-        await send_msgs(bot, "1233", "group", ["msg"])
+        await send_msgs(bot, "1233", "group", [Message("msg")])
         ctx.should_call_api(
             "send_group_msg", {"group_id": "1233", "message": "msg"}, True
         )