diff --git a/main.py b/main.py
index 4628a02..f783b20 100644
--- a/main.py
+++ b/main.py
@@ -39,7 +39,8 @@ async def startup():
 index_html = open('templates/index.html', 'r', encoding='utf-8').read() \
     .replace('{{title}}', settings.TITLE) \
     .replace('{{description}}', settings.DESCRIPTION) \
-    .replace('{{keywords}}', settings.KEYWORDS)
+    .replace('{{keywords}}', settings.KEYWORDS) \
+    .replace("'{{fileSizeLimit}}'", str(settings.FILE_SIZE_LIMIT))
 # 管理页面
 admin_html = open('templates/admin.html', 'r', encoding='utf-8').read() \
     .replace('{{title}}', settings.TITLE) \
@@ -116,7 +117,7 @@ async def index(code: str, ip: str = Depends(error_ip_limit), s: AsyncSession =
     if info.type != 'text':
         info.text = f'/select?code={code}'
     return {
-        'detail': '取件成功，请点击"取"查看',
+        'detail': f'取件成功，文件将在{settings.DELETE_EXPIRE_FILES_INTERVAL}分钟后删除',
         'data': {'type': info.type, 'text': info.text, 'name': info.name, 'code': info.code}
     }
 
diff --git a/readme.md b/readme.md
index ff6266f..e85f7c8 100644
--- a/readme.md
+++ b/readme.md
@@ -104,8 +104,6 @@ DATABASE_URL=sqlite+aiosqlite:///database.db
 DATA_ROOT=./static
 # 静态文件夹URL
 STATIC_URL=/static
-# 是否开启上传
-ENABLE_UPLOAD=true
 # 错误次数
 ERROR_COUNT=5
 # 错误限制分钟数
@@ -114,6 +112,8 @@ ERROR_MINUTE=10
 UPLOAD_COUNT=60
 # 上传限制分钟数
 UPLOAD_MINUTE=1
+# 删除过期文件的间隔（秒）
+DELETE_EXPIRE_FILES_INTERVAL=60
 # 管理地址
 ADMIN_ADDRESS=admin
 # 管理密码
diff --git a/readme_en.md b/readme_en.md
index d9f906c..ed02f7e 100644
--- a/readme_en.md
+++ b/readme_en.md
@@ -113,8 +113,6 @@ DATABASE_URL=sqlite+aiosqlite:///database.db
 DATA_ROOT=./static
 # 静态文件夹URL
 STATIC_URL=/static
-# 是否开启上传
-ENABLE_UPLOAD=true
 # 错误次数
 ERROR_COUNT=5
 # 错误限制分钟数
@@ -123,6 +121,8 @@ ERROR_MINUTE=10
 UPLOAD_COUNT=60
 # 上传限制分钟数
 UPLOAD_MINUTE=1
+# 删除过期文件的间隔（秒）
+DELETE_EXPIRE_FILES_INTERVAL=60
 # 管理地址
 ADMIN_ADDRESS=admin
 # 管理密码
diff --git a/settings.py b/settings.py
index 21e9b47..80b3111 100644
--- a/settings.py
+++ b/settings.py
@@ -27,6 +27,8 @@ ERROR_MINUTE = config('ERROR_MINUTE', cast=int, default=10)
 UPLOAD_COUNT = config('UPLOAD_COUNT', cast=int, default=60)
 # 上传限制分钟数
 UPLOAD_MINUTE = config('UPLOAD_MINUTE', cast=int, default=1)
+# 删除过期文件的间隔（秒）
+DELETE_EXPIRE_FILES_INTERVAL = config('DELETE_EXPIRE_FILES_INTERVAL', cast=int, default=10)
 # 管理地址
 ADMIN_ADDRESS = config('ADMIN_ADDRESS', cast=str, default="admin")
 # 管理密码
diff --git a/templates/index.html b/templates/index.html
index c078cda..27eeae5 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -102,6 +102,7 @@
                         multiple
                         style="margin: 1rem 0;"
                         :data="uploadData"
+                        :before-upload="beforeUpload"
                         :headers="{'pwd':pwd}"
                         :on-success="successUpload"
                         :on-error="errorUpload"
@@ -195,6 +196,7 @@
                 files: [],
                 pageNum: 0,
                 inputDisable: false,
+                fileSizeLimit: '{{fileSizeLimit}}',
                 pwd: localStorage.getItem('pwd') || '',
                 uploadData: {
                     style: '2',
@@ -322,6 +324,15 @@
                     type: 'error'
                 });
             },
+            beforeUpload: function (file) {
+                if (file.size > this.fileSizeLimit) {
+                    this.$message({
+                        message: `文件大小不能超过${this.fileSizeLimit/1024/1024}MB`,
+                        type: 'error'
+                    });
+                    return false
+                }
+            }
         }
     })
 </script>
diff --git a/utils.py b/utils.py
index fd648bd..fd10797 100644
--- a/utils.py
+++ b/utils.py
@@ -33,7 +33,7 @@ async def delete_expire_files():
             query = delete(Codes).where(Codes.id.in_(exps_ids))
             await s.execute(query)
             await s.commit()
-        await asyncio.sleep(random.randint(2, 2))
+        await asyncio.sleep(settings.DELETE_EXPIRE_FILES_INTERVAL)
 
 
 async def get_code(s: AsyncSession):