diff --git a/DownloadKit/_funcs.py b/DownloadKit/_funcs.py
index a91e29daf8657c37a05bb11908553cceb799ce9a..8ec6be92d3ed18af6773636b5102af1c75d86d8a 100644
--- a/DownloadKit/_funcs.py
+++ b/DownloadKit/_funcs.py
@@ -13,6 +13,9 @@ from urllib.parse import unquote
 
 from requests import Session
 
+FILE_EXISTS_MODE = {'rename': 'rename', 'overwrite': 'overwrite', 'skip': 'skip', 'add': 'add', 'r': 'rename',
+                    'o': 'overwrite', 's': 'skip', 'a': 'add'}
+
 
 def copy_session(session):
     """复制输入Session对象，返回一个新的
@@ -67,15 +70,23 @@ class PathSetter(object):
 
 class FileExistsSetter(object):
     def __set__(self, file_exists, mode):
-        mode = mode.lower()
-        if mode not in ('skip', 'overwrite', 'rename', 'add'):
-            raise ValueError("file_exists参数只能传入'skip', 'overwrite', 'rename', 'add'")
-        file_exists._file_exists = mode
+        file_exists._file_exists = get_file_exists_mode(mode)
 
     def __get__(self, file_exists, objtype=None):
         return file_exists._file_exists
 
 
+def get_file_exists_mode(mode):
+    """获取文件重名时处理策略名称
+    :param mode: 输入
+    :return: 标准字符串
+    """
+    mode = FILE_EXISTS_MODE.get(mode, mode)
+    if mode not in FILE_EXISTS_MODE:
+        raise ValueError(f'''mode参数只能是 '{"', '".join(FILE_EXISTS_MODE.keys())}' 之一，现在是：{mode}''')
+    return mode
+
+
 def get_usable_path(path):
     """检查文件或文件夹是否有重名，并返回可以使用的路径
     :param path: 文件或文件夹路径
@@ -164,12 +175,13 @@ def set_charset(response):
     return response
 
 
-def get_file_info(response, goal_path=None, rename=None, file_exists=None, lock=None):
+def get_file_info(response, goal_path=None, rename=None, suffix=None, file_exists=None, lock=None):
     """获取文件信息，大小单位为byte
     包括：size、path、skip
     :param response: Response对象
     :param goal_path: 目标文件夹
     :param rename: 重命名
+    :param suffix: 重命名后缀名
     :param file_exists: 存在重名文件时的处理方式
     :param lock: 线程锁
     :return: 文件名、文件大小、保存路径、是否跳过
@@ -189,13 +201,23 @@ def get_file_info(response, goal_path=None, rename=None, file_exists=None, lock=
     goal_Path.mkdir(parents=True, exist_ok=True)
 
     # ------------获取保存文件名------------
-    # -------------------重命名，不改变扩展名-------------------
+    # -------------------重命名-------------------
     if rename:
-        tmp = file_name.rsplit('.', 1)
-        ext_name = tmp[-1] if len(tmp) > 1 else ''
-        tmp = rename.rsplit('.', 1)
-        ext_rename = tmp[-1] if len(tmp) > 1 else ''
-        full_name = rename if ext_rename == ext_name else f'{rename}.{ext_name}'
+        if suffix is not None:
+            full_name = f'{rename}.{suffix}' if suffix else rename
+
+        else:
+            tmp = file_name.rsplit('.', 1)
+            ext_name = tmp[-1] if len(tmp) > 1 else ''
+            tmp = rename.rsplit('.', 1)
+            ext_rename = tmp[-1] if len(tmp) > 1 else ''
+            full_name = rename if ext_rename == ext_name else f'{rename}.{ext_name}'
+
+    elif suffix is not None:
+        full_name = file_name.rsplit(".", 1)[0]
+        if suffix:
+            full_name = f'{full_name}.{suffix}'
+
     else:
         full_name = file_name
 
diff --git a/DownloadKit/_funcs.pyi b/DownloadKit/_funcs.pyi
index 6f3ab2b6472750f69814143e82f516332561da40..2f57c15ce50f824d207d1d5c5ad1148bd4e82168 100644
--- a/DownloadKit/_funcs.pyi
+++ b/DownloadKit/_funcs.pyi
@@ -9,6 +9,8 @@ from typing import Union
 
 from requests import Session, Response
 
+FILE_EXISTS_MODE: dict = ...
+
 
 def copy_session(session: Session) -> Session: ...
 
@@ -31,6 +33,9 @@ class FileExistsSetter(object):
     def __get__(self, file_exists, objtype=None): ...
 
 
+def get_file_exists_mode(mode: str) -> str: ...
+
+
 def get_usable_path(path: Union[str, Path]) -> Path: ...
 
 
@@ -43,11 +48,8 @@ def get_long(txt: str) -> int: ...
 def set_charset(response: Response) -> Response: ...
 
 
-def get_file_info(response: Response,
-                  goal_path: str = None,
-                  rename: str = None,
-                  file_exists: str = None,
-                  lock: Lock = None) -> dict: ...
+def get_file_info(response: Response, goal_path: str = None, rename: str = None, suffix: str = None,
+                  file_exists: str = None, lock: Lock = None) -> dict: ...
 
 
 def set_session_cookies(session: Session, cookies: list) -> None: ...
diff --git a/DownloadKit/downloadKit.py b/DownloadKit/downloadKit.py
index f35aadc5df874980c72f9cc28e3a0407e532e0d9..630b952bb4ab0f9aa04855520d9c0e87673d14f3 100644
--- a/DownloadKit/downloadKit.py
+++ b/DownloadKit/downloadKit.py
@@ -14,7 +14,7 @@ from time import sleep, perf_counter
 from requests import Response
 from requests.structures import CaseInsensitiveDict
 
-from ._funcs import FileExistsSetter, PathSetter, BlockSizeSetter, set_charset, get_file_info
+from ._funcs import FileExistsSetter, PathSetter, BlockSizeSetter, set_charset, get_file_info, get_file_exists_mode
 from .mission import Task, Mission
 from .setter import Setter
 
@@ -131,11 +131,12 @@ class DownloadKit(object):
         """用list方式返回所有任务对象"""
         return self._missions
 
-    def add(self, file_url, goal_path=None, rename=None, file_exists=None, split=None, **kwargs):
+    def add(self, file_url, goal_path=None, rename=None, suffix=None, file_exists=None, split=None, **kwargs):
         """添加一个下载任务并将其返回
         :param file_url: 文件网址
         :param goal_path: 保存路径
         :param rename: 重命名的文件名
+        :param suffix: 重命名的文件后缀名
         :param file_exists: 遇到同名文件时的处理方式，可选 'skip', 'overwrite', 'rename', 'add'，默认跟随实例属性
         :param split: 是否允许多线程分块下载，为None则使用对象属性
         :param kwargs: 连接参数
@@ -143,20 +144,21 @@ class DownloadKit(object):
         """
         self._missions_num += 1
         self._running_count += 1
-        mission = Mission(self._missions_num, self, file_url,
-                          str(goal_path or self.goal_path),
-                          rename, file_exists or self.file_exists,
-                          self.split if split is None else split,
-                          kwargs)
+        if file_exists is not None:
+            file_exists = get_file_exists_mode(file_exists)
+        mission = Mission(self._missions_num, self, file_url, str(goal_path or self.goal_path),
+                          rename, suffix, file_exists or self.file_exists,
+                          self.split if split is None else split, kwargs)
         self._missions[self._missions_num] = mission
         self._run_or_wait(mission)
         return mission
 
-    def download(self, file_url, goal_path=None, rename=None, file_exists=None, show_msg=True, **kwargs):
+    def download(self, file_url, goal_path=None, rename=None, suffix=None, file_exists=None, show_msg=True, **kwargs):
         """以阻塞的方式下载一个文件并返回结果
         :param file_url: 文件网址
         :param goal_path: 保存路径
         :param rename: 重命名的文件名
+        :param suffix: 重命名的文件后缀名
         :param file_exists: 遇到同名文件时的处理方式，可选 'skip', 'overwrite', 'rename', 'add'，默认跟随实例属性
         :param show_msg: 是否打印进度
         :param kwargs: 连接参数
@@ -165,7 +167,7 @@ class DownloadKit(object):
         if show_msg:
             tmp = self._print_mode
             self._print_mode = None
-        r = self.add(file_url=file_url, goal_path=goal_path, rename=rename, file_exists=file_exists,
+        r = self.add(file_url=file_url, goal_path=goal_path, rename=rename, suffix=suffix, file_exists=file_exists,
                      split=False, **kwargs).wait(show=show_msg)
         if show_msg:
             self._print_mode = tmp
@@ -392,6 +394,7 @@ class DownloadKit(object):
             self._logger.add_data(('开始下载', mission.data.url))
 
         rename = mission.data.rename
+        suffix = mission.data.suffix
         goal_path = mission.data.goal_path
         file_exists = mission.data.file_exists
         split = mission.data.split
@@ -403,11 +406,13 @@ class DownloadKit(object):
         goal_Path.mkdir(parents=True, exist_ok=True)
         goal_path = str(goal_Path)
 
-        if file_exists == 'skip' and rename and (goal_Path / rename).exists():
-            mission.file_name = rename
-            mission._set_path(goal_Path / rename)
-            mission._set_done('skipped', str(mission.path))
-            return
+        if file_exists == 'skip' and rename:
+            tmp = goal_Path / rename
+            if tmp.exists() and tmp.is_file():
+                mission.file_name = rename
+                mission._set_path(goal_Path / rename)
+                mission._set_done('skipped', str(mission.path))
+                return
 
         r, inf = self._connect(file_url, mission.session, mission.method, **kwargs)
 
@@ -419,7 +424,7 @@ class DownloadKit(object):
             return
 
         # -------------------获取文件信息-------------------
-        file_info = get_file_info(r, goal_path, rename, file_exists, self._lock)
+        file_info = get_file_info(r, goal_path, rename, suffix, file_exists, self._lock)
         file_size = file_info['size']
         full_path = file_info['path']
         mission._set_path(full_path)
diff --git a/DownloadKit/downloadKit.pyi b/DownloadKit/downloadKit.pyi
index 7cc1c7153a5c07d8b45aee1241172e6fc36d8b7d..de3c5413d7b654db10229e80954c6146b1c7e4a3 100644
--- a/DownloadKit/downloadKit.pyi
+++ b/DownloadKit/downloadKit.pyi
@@ -16,7 +16,7 @@ from ._funcs import FileExistsSetter, PathSetter, BlockSizeSetter
 from .mission import Task, Mission, BaseTask
 from .setter import Setter
 
-FILE_EXISTS = Literal['add', 'skip', 'rename', 'overwrite']
+FILE_EXISTS = Literal['add', 'skip', 'rename', 'overwrite', 'a', 's', 'r', 'o']
 
 
 class DownloadKit(object):
@@ -102,6 +102,7 @@ class DownloadKit(object):
             file_url: str,
             goal_path: Optional[str, Path] = None,
             rename: str = None,
+            suffix: str = None,
             file_exists: FILE_EXISTS = None,
             split: bool = None,
             timeout: Optional[float] = None,
@@ -123,6 +124,7 @@ class DownloadKit(object):
                  file_url: str,
                  goal_path: Optional[str, Path] = None,
                  rename: str = None,
+                 suffix: str = None,
                  file_exists: FILE_EXISTS = None,
                  show_msg: bool = True,
                  timeout: Optional[float] = None,
diff --git a/DownloadKit/mission.py b/DownloadKit/mission.py
index 270557840c3bb4d8ff4242ba75110b33ef57f69d..92f32f42b8264c1982726a4cc78bb942b321f575 100644
--- a/DownloadKit/mission.py
+++ b/DownloadKit/mission.py
@@ -14,19 +14,21 @@ from ._funcs import copy_session, set_session_cookies
 
 
 class MissionData(object):
-    def __init__(self, url, goal_path, rename, file_exists, split, kwargs, offset=0):
+    def __init__(self, url, goal_path, rename, suffix, file_exists, split, kwargs, offset=0):
         """保存任务数据的对象
         :param url: 下载文件url
         :param goal_path: 保存文件夹
         :param rename: 文件重命名
+        :param suffix: 文件重命名后缀名
         :param file_exists: 存在重名文件时处理方式
         :param split: 是否允许分块下载
         :param kwargs: requests其它参数
         :param offset: 文件存储偏移量
         """
-        self.url = quote(url, safe='/:&?=%;#@+![]')
+        self.url = quote(url, safe='-_.~!*\'();:@&=+$,/?#[]')
         self.goal_path = goal_path
         self.rename = rename
+        self.suffix = suffix
         self.file_exists = file_exists
         self.split = split
         self.kwargs = kwargs
@@ -74,14 +76,14 @@ class BaseTask(object):
 
 
 class Mission(BaseTask):
-    def __init__(self, ID, download_kit, file_url, goal_path, rename,
-                 file_exists, split, kwargs):
+    def __init__(self, ID, download_kit, file_url, goal_path, rename, suffix, file_exists, split, kwargs):
         """任务类
         :param ID: 任务id
         :param download_kit: 所属DownloadKit对象
         :param file_url: 文件网址
         :param goal_path: 保存文件夹路径
         :param rename: 重命名
+        :param suffix: 重命名后缀名
         :param file_exists: 存在同名文件处理方式
         :param split: 是否分块下载
         :param kwargs: 连接参数
@@ -100,7 +102,7 @@ class Mission(BaseTask):
 
         self.session = self._set_session()
         kwargs = self._handle_kwargs(file_url, kwargs)
-        self._data = MissionData(file_url, goal_path, rename, file_exists, split, kwargs)
+        self._data = MissionData(file_url, goal_path, rename, suffix, file_exists, split, kwargs)
         self.method = 'post' if (self._data.kwargs.get('data', None) is not None or
                                  self._data.kwargs.get('json', None) is not None) else 'get'
 
diff --git a/DownloadKit/mission.pyi b/DownloadKit/mission.pyi
index c91570fcd86250cf4ad73279418dfe0ce9b12e95..237fcf513f42f8cff9902e9960303e0816cd38b9 100644
--- a/DownloadKit/mission.pyi
+++ b/DownloadKit/mission.pyi
@@ -13,12 +13,13 @@ class MissionData(object):
     url: str = ...
     goal_path: Union[str, Path] = ...
     rename: Optional[str] = ...
+    suffix: Optional[str] = ...
     file_exists: str = ...
     split: bool = ...
     kwargs: dict = ...
     offset: int = ...
 
-    def __init__(self, url: str, goal_path: Union[str, Path], rename: Optional[str],
+    def __init__(self, url: str, goal_path: Union[str, Path], rename: Optional[str], suffix: Optional[str],
                  file_exists: str, split: bool, kwargs: dict, offset: int = 0): ...
 
 
@@ -64,7 +65,7 @@ class Mission(BaseTask):
     method: str = ...
 
     def __init__(self, ID: int, download_kit: DownloadKit, file_url: str, goal_path: Union[str, Path], rename: str,
-                 file_exists: str, split: bool, kwargs: dict): ...
+                 suffix: str, file_exists: str, split: bool, kwargs: dict): ...
 
     def __repr__(self) -> str: ...
 
diff --git a/DownloadKit/setter.py b/DownloadKit/setter.py
index 43fe163d22bc54317019ace71b8c76ced3422475..5f5a6314d7e7ae30a12b9bcf5235058c60d871b2 100644
--- a/DownloadKit/setter.py
+++ b/DownloadKit/setter.py
@@ -7,6 +7,8 @@
 from DataRecorder import Recorder
 from requests import Session
 
+from ._funcs import get_file_exists_mode
+
 
 class Setter(object):
     def __init__(self, downloadKit):
@@ -192,9 +194,7 @@ class FileExists(object):
         :param mode: 'skip', 'rename', 'overwrite', 'add'
         :return: None
         """
-        if mode not in ('skip', 'rename', 'overwrite', 'add'):
-            raise ValueError("mode参数只能是'skip', 'rename', 'overwrite', 'add'")
-        self._setter._downloadKit.file_exists = mode
+        self._setter._downloadKit.file_exists = get_file_exists_mode(mode)
 
     def skip(self):
         """设为跳过"""
diff --git a/DownloadKit/setter.pyi b/DownloadKit/setter.pyi
index 359325be7101c7629126296d3f8cc7eff4b91b2e..42820c7e8ec9b783fecf4b54f57c468eca0afe73 100644
--- a/DownloadKit/setter.pyi
+++ b/DownloadKit/setter.pyi
@@ -6,13 +6,13 @@
 from pathlib import Path
 from typing import Union, Literal
 
-from DrissionPage.base import BasePage
 from DrissionPage import SessionOptions
+from DrissionPage.base import BasePage
 from requests import Session
 
 from .downloadKit import DownloadKit
 
-FILE_EXISTS = Literal['add', 'skip', 'rename', 'overwrite']
+FILE_EXISTS = Literal['add', 'skip', 'rename', 'overwrite', 'a', 's', 'r', 'o']
 
 
 class Setter(object):
diff --git a/setup.py b/setup.py
index 639af0d0750fcecef822856fa84fad66cc9651d5..d97b2208a2103a007dd15ebfb21e26e6cb02ce77 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@ with open("README.md", "r", encoding='utf-8') as fh:
 
 setup(
     name="DownloadKit",
-    version="1.0.3",
+    version="1.0.4",
     author="g1879",
     author_email="g1879@qq.com",
     description="一个简洁易用的多线程文件下载工具。",