diff --git a/src/Controllers/ManagementController.cs b/src/Controllers/ManagementController.cs
index bb8003c..346e172 100644
--- a/src/Controllers/ManagementController.cs
+++ b/src/Controllers/ManagementController.cs
@@ -5,6 +5,7 @@ using Microsoft.AspNetCore.Mvc;
 using Serilog;
 using System.Text.Json;
 using iFileProxy.Attributes;
+
 namespace iFileProxy.Controllers
 {
     [Authorize(UserMask.Admin,UserMask.SuperAdmin)]
diff --git a/src/Controllers/UserController.cs b/src/Controllers/UserController.cs
index 74217f5..75a1ea9 100644
--- a/src/Controllers/UserController.cs
+++ b/src/Controllers/UserController.cs
@@ -1,8 +1,8 @@
 using iFileProxy.Attributes;
+using iFileProxy.Helpers;
 using iFileProxy.Models;
 using iFileProxy.Services;
 using Microsoft.AspNetCore.Mvc;
-using Newtonsoft.Json;
 
 namespace iFileProxy.Controllers
 {
@@ -27,8 +27,8 @@ namespace iFileProxy.Controllers
         {
             try
             {
-                var ip = HttpContext.Connection.RemoteIpAddress?.ToString() ?? "unknown";
-                var (success, message) = await _authService.RegisterAsync(request.Username, request.Password, ip, request.NickName);
+                var ip = MasterHelper.GetClientIPAddr(HttpContext);
+                var (success, message) = await _authService.RegisterAsync(request,ip);
 
                 return Ok(new CommonRsp
                 {
@@ -106,9 +106,6 @@ namespace iFileProxy.Controllers
                     });
                 }
 
-
-                _logger.LogInformation(JsonConvert.SerializeObject(user));
-
                 // 不返回敏感信息
                 return Ok(new CommonRsp
                 {
@@ -592,16 +589,4 @@ namespace iFileProxy.Controllers
         }
     }
 
-    public class RegisterRequest
-    {
-        public string Username { get; set; } = string.Empty;
-        public string Password { get; set; } = string.Empty;
-        public string NickName { get; set; } = string.Empty;
-    }
-
-    public class LoginRequest
-    {
-        public string Username { get; set; } = string.Empty;
-        public string Password { get; set; } = string.Empty;
-    }
 } 
\ No newline at end of file
diff --git a/src/Models/User.cs b/src/Models/User.cs
index dbd01e5..b0dadf9 100644
--- a/src/Models/User.cs
+++ b/src/Models/User.cs
@@ -4,9 +4,10 @@ namespace iFileProxy.Models
 {
     public enum UserMask
     {
+        Guest = -1, // 访客
         User = 0,
         Admin = 1,
-        SuperAdmin = 2 // 超级管理员
+        SuperAdmin = 2, // 超级管理员
     }
     public enum UserState
     {
@@ -77,6 +78,12 @@ namespace iFileProxy.Models
         /// </summary>
         [JsonProperty("last_login_ip")]
         public string LastLoginIP { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 电子邮箱
+        /// </summary>
+        [JsonProperty("email")]
+        public string Email { get; set; } = string.Empty;
     }
 
     public class UserEvent
@@ -132,4 +139,29 @@ namespace iFileProxy.Models
         [JsonProperty("nickname")]
         public string Nickname { get; set; } = string.Empty;
     }
+
+
+    /// <summary>
+    /// 注册请求数据结构
+    /// </summary>
+    public class RegisterRequest
+    {
+        public string Username { get; set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+        public string NickName { get; set; } = string.Empty;
+        public string Email { get; set; } = string.Empty;
+    }
+
+    /// <summary>
+    /// 登录请求数据结构
+    /// </summary>
+    public class LoginRequest
+    {
+        /// <summary>
+        /// 用户名或邮箱
+        /// </summary>
+        public string Username { get; set; } = string.Empty;
+        public string Account { get; set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+    }
 }
diff --git a/src/Program.cs b/src/Program.cs
index 8aebddf..babdb49 100644
--- a/src/Program.cs
+++ b/src/Program.cs
@@ -16,18 +16,18 @@ namespace iFileProxy
             SerilogConfig.CreateLogger();
             Serilog.ILogger logger = Log.Logger.ForContext<Program>();
 
-            Console.Write(" "); // ǿ��֢�����ſ�ʼ��������־�����벻�þ�
+            Console.Write(" "); // ǿ��֢�����ſ�ʼ��������־�����벻�þ�
 
             var builder = WebApplication.CreateBuilder(args);
 
-            // ���� CORS ����
+            // ���� CORS ����
             builder.Services.AddCors(options =>
             {
                 options.AddPolicy("AllowFrontend",
                     builder =>
                     {
                         builder
-                            .WithOrigins("http://localhost:3000", "http://admin.gitdl.cn", "https://admin.gitdl.cn","http://47.243.56.137:50050") // ǰ�˵�ַ
+                            .WithOrigins("http://localhost:3000", "http://admin.gitdl.cn", "https://admin.gitdl.cn","http://47.243.56.137:50050") // ǰ�˵�ַ
                             .AllowAnyMethod()
                             .AllowAnyHeader()
                             .AllowCredentials();
@@ -55,10 +55,10 @@ namespace iFileProxy
 
             builder.Services.AddSingleton<TaskManager>();
 
-            // ������֤����
+            // ������֤����
             builder.Services.AddScoped<AuthService>();
 
-            // ����JWT��֤
+            // ����JWT��֤
             builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
                 .AddJwtBearer(options =>
                 {
@@ -98,17 +98,17 @@ namespace iFileProxy
                 app.UseSwaggerUI();
             }
 
-            // ��������
+            // ��������
             app.UseMiddleware<ErrorHandlerMiddleware>();
 
             app.UseCors("AllowFrontend");
 
             app.UseHttpsRedirection();
 
-            // ����Ĭ���ļ�ѡ��
+            // ����Ĭ���ļ�ѡ��
             var defaultFilesOptions = new DefaultFilesOptions();
-            defaultFilesOptions.DefaultFileNames.Clear(); // ���Ĭ���б�
-            defaultFilesOptions.DefaultFileNames.Add("index.html"); // �����Զ���Ĭ���ļ�
+            defaultFilesOptions.DefaultFileNames.Clear(); // ���Ĭ���б�
+            defaultFilesOptions.DefaultFileNames.Add("index.html"); // �����Զ���Ĭ���ļ�
 
             app.UseDefaultFiles(defaultFilesOptions);
 
@@ -120,7 +120,7 @@ namespace iFileProxy
                 app.Services.GetRequiredService<Dictionary<string, Dictionary<string, uint>>>(),
                 AppConfig.GetCurrConfig().SecurityOptions.DailyRequestLimitPerIP);
 
-            // ������
+            // ������
             app.UseMiddleware<JwtMiddleware>();
 
             app.MapControllers();
diff --git a/src/Services/AuthService.cs b/src/Services/AuthService.cs
index 7b2a169..b07cf8f 100644
--- a/src/Services/AuthService.cs
+++ b/src/Services/AuthService.cs
@@ -20,14 +20,14 @@ namespace iFileProxy.Services
             _logger = logger;
         }
 
-        public async Task<(bool success, string message)> RegisterAsync(string username, string password, string ip, string nickname)
+        public async Task<(bool success, string message)> RegisterAsync(RegisterRequest request, string ipAddr)
         {
             try
             {
                 // 检查用户名是否已存在
-                if (await _dbGateService.UserExistsAsync(username))
+                if (await _dbGateService.UserExistsAsync(request.Username, request.Email))
                 {
-                    return (false, "用户名已存在");
+                    return (false, "用户名或电子邮件已存在");
                 }
 
                 // 检查是否是第一个用户
@@ -36,12 +36,13 @@ namespace iFileProxy.Services
                 // 创建新用户
                 var user = new User
                 {
-                    Username = username,
-                    PasswordHash = BCrypt.Net.BCrypt.HashPassword(password),
-                    LastLoginIP = ip,
+                    Username = request.Username,
+                    PasswordHash = BCrypt.Net.BCrypt.HashPassword(request.Password),
+                    LastLoginIP = ipAddr,
                     // 如果是第一个用户，设置为超级管理员
                     Mask = isFirstUser ? UserMask.SuperAdmin : UserMask.User,
-                    Nickname = nickname
+                    Nickname = request.NickName,
+                    Email = request.Email,
                 };
 
                 // 保存用户
@@ -52,12 +53,12 @@ namespace iFileProxy.Services
                 {
                     UserId = user.UserId,
                     EventType = UserEventType.Registry,
-                    EventIP = ip,
-                    EventDetail = isFirstUser ? "管理员注册" : "用户注册"
+                    EventIP = ipAddr,
+                    EventDetail = isFirstUser ? "超级管理员注册" : "用户注册"
                 };
                 await _dbGateService.CreateUserEventAsync(userEvent);
 
-                return (true, isFirstUser ? "管理员注册成功" : "注册成功");
+                return (true, isFirstUser ? "超级管理员注册成功" : "注册成功");
             }
             catch (Exception ex)
             {
@@ -66,11 +67,11 @@ namespace iFileProxy.Services
             }
         }
 
-        public async Task<(bool success, string token, string message)> LoginAsync(string username, string password, string ip)
+        public async Task<(bool success, string token, string message)> LoginAsync(string account, string password, string ip)
         {
             try
             {
-                var user = await _dbGateService.GetUserByUsernameAsync(username);
+                var user = await _dbGateService.GetUserByAccountAsync(account);
                 if (user == null)
                 {
                     return (false, string.Empty, "用户不存在");
@@ -97,7 +98,7 @@ namespace iFileProxy.Services
                     UserId = user.UserId,
                     EventType = UserEventType.Login,
                     EventIP = ip,
-                    EventDetail = "用户登录"
+                    EventDetail = $"用户通过{(account.Contains('@') ? "邮箱" : "用户名")}登录"
                 };
                 await _dbGateService.CreateUserEventAsync(userEvent);
 
diff --git a/src/Services/DatabaseGateService.cs b/src/Services/DatabaseGateService.cs
index 9d76e73..c9664b0 100644
--- a/src/Services/DatabaseGateService.cs
+++ b/src/Services/DatabaseGateService.cs
@@ -39,6 +39,7 @@ namespace iFileProxy.Services
                 `user_id` varchar(36) NOT NULL,
                 `username` varchar(50) NOT NULL,
                 `nickname` varchar(50) NOT NULL,
+                `email` varchar(100) NOT NULL,
                 `password_hash` varchar(255) NOT NULL,
                 `mask` int NOT NULL DEFAULT 0,
                 `state` int NOT NULL DEFAULT 0,
@@ -46,7 +47,8 @@ namespace iFileProxy.Services
                 `last_login_time` datetime NULL,
                 `last_login_ip` varchar(45) NULL,
                 PRIMARY KEY (`user_id`),
-                UNIQUE KEY `username` (`username`)
+                UNIQUE KEY `username` (`username`),
+                UNIQUE KEY `email` (`email`)
             ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
         """;
 
@@ -196,6 +198,20 @@ namespace iFileProxy.Services
             return n;
         }
 
+        /// <summary>
+        /// 内部查询数据专用 当此方法暴露给C端可能造成sql注入等安全问题
+        /// </summary>
+        /// <param name="sql">SQL语句</param>
+        /// <param name="dbConfName">配置文件中的Description字段</param>
+        /// <returns>影响的行数</returns>
+        public int Query(string sql, MySqlConnection connection)
+        {
+            using MySqlCommand sqlCmd = new(sql, connection);
+            int n = sqlCmd.ExecuteNonQuery();
+            _logger.Debug($"查询完成, 受影响的行数: {n}");
+            return n;
+        }
+
         public List<TaskInfo> CheckCacheDependencies(string taskId,string ipAddr)
         {
             string sql = $"SELECT * FROM t_tasks_info WHERE `status` = @status AND `tag` = @tag AND `client_ip` <> @ip_addr";
@@ -362,10 +378,11 @@ namespace iFileProxy.Services
 
         }
 
-        public bool UpdateTaskStatus(TaskInfo taskInfo)
+        public bool UpdateTaskStatus(TaskInfo taskInfo, MySqlConnection? connection = null)
         {
             string sql = @"UPDATE t_tasks_info set `status` = @status , update_time = Now() WHERE `tid` = @tid";
-            MySqlConnection conn = GetAndOpenDBConn("iFileProxy_Db");
+            MySqlConnection conn = connection ?? GetAndOpenDBConn("iFileProxy_Db");
+            
             try
             {
                 using MySqlCommand sqlCmd = new (sql, conn);
@@ -623,12 +640,13 @@ namespace iFileProxy.Services
             return users.FirstOrDefault();
         }
 
-        public async Task<bool> UserExistsAsync(string username)
+        public async Task<bool> UserExistsAsync(string username, string email)
         {
-            var sql = "SELECT COUNT(*) FROM t_users WHERE username = @username";
+            var sql = "SELECT COUNT(*) FROM t_users WHERE username = @username OR email = @email";
             var parameters = new Dictionary<string, object>
             {
-                { "@username", username }
+                { "@username", username },
+                { "@email", email }
             };
             var count = await ExecuteScalarAsync<long>(sql, parameters);
             return count > 0;
@@ -636,8 +654,8 @@ namespace iFileProxy.Services
 
         public async Task<bool> CreateUserAsync(User user)
         {
-            var sql = @"INSERT INTO t_users (user_id, username, password_hash, mask, state, create_time, last_login_time, last_login_ip, nickname) 
-                       VALUES (@userId, @username, @passwordHash, @mask, @state, @createTime, @lastLoginTime, @lastLoginIp, @nickname)";
+            var sql = @"INSERT INTO t_users (user_id, username, password_hash, mask, state, create_time, last_login_time, last_login_ip, nickname, email) 
+                       VALUES (@userId, @username, @passwordHash, @mask, @state, @createTime, @lastLoginTime, @lastLoginIp, @nickname, @email)";
             
             var parameters = new Dictionary<string, object>
             {
@@ -650,7 +668,7 @@ namespace iFileProxy.Services
                 { "@lastLoginTime", user.LastLoginTime },
                 { "@lastLoginIp", user.LastLoginIP },
                 { "@nickname", user.Nickname },
-
+                { "@email", user.Email }
             };
 
             var result = await ExecuteNonQueryAsync(sql, parameters);
@@ -870,5 +888,17 @@ namespace iFileProxy.Services
                 Data = events
             };
         }
+
+        public async Task<User?> GetUserByAccountAsync(string account)
+        {
+            var sql = "SELECT * FROM t_users WHERE username = @account OR email = @account";
+            var parameters = new Dictionary<string, object>
+            {
+                { "@account", account }
+            };
+
+            var users = await ExecuteQueryAsync<User>(sql, parameters);
+            return users.FirstOrDefault();
+        }
     }
 }
diff --git a/src/Services/LocalCacheManager.cs b/src/Services/LocalCacheManager.cs
index a003150..aa44e43 100644
--- a/src/Services/LocalCacheManager.cs
+++ b/src/Services/LocalCacheManager.cs
@@ -38,6 +38,9 @@ namespace iFileProxy.Services
         /// </summary>
         public void CheckAndCleanCache(object state)
         {
+            // 初始化并打开一个MySQL连接 防止后续数据过多导致程序crush
+            var dbConn = _dbGateService.GetAndOpenDBConn(DbConfigName.iFileProxy);
+
             // 获取数据库中超出生命周期的缓存数据
             string result = _dbGateService.QueryTableData($"SELECT * FROM t_tasks_info WHERE  UNIX_TIMESTAMP(NOW()) - UNIX_TIMESTAMP(update_time) > {CACHE_LIFETIME} AND (tag <> 'CLEANED' OR tag IS NULL)", DbConfigName.iFileProxy);
             List<TaskInfo>? taskInfos = JsonConvert.DeserializeObject<List<TaskInfo>>(result);
@@ -59,9 +62,9 @@ namespace iFileProxy.Services
                             throw;
                         }
                     }
-                    _dbGateService.Query($"UPDATE t_tasks_info SET `tag` = \"CLEANED\" WHERE `tid` = '{taskInfo.TaskId}'", DbConfigName.iFileProxy);
+                    _dbGateService.Query($"UPDATE t_tasks_info SET `tag` = \"CLEANED\" WHERE `tid` = '{taskInfo.TaskId}'", dbConn);
                     taskInfo.Status = TaskState.Cleaned;
-                    _dbGateService.UpdateTaskStatus(taskInfo);
+                    _dbGateService.UpdateTaskStatus(taskInfo,dbConn);
                 }
             }
         }
diff --git a/src/iFileProxy.json b/src/iFileProxy.json
index 27e45a4..bf3f1b0 100644
--- a/src/iFileProxy.json
+++ b/src/iFileProxy.json
@@ -16,7 +16,7 @@
   "Download": {
     "SavePath": "./download/", // 临时文件保存位置
     "ThreadNum": 4, // 下载线程数
-    "MaxAllowedFileSize": 65536, // 允许代理的最大文件尺寸
+    "MaxAllowedFileSize": 1000000000, // 允许代理的最大文件尺寸
     "MaxParallelTasks": 4, // 同一时间最大并行任务数
     "MaxQueueLength": 60, // 最大等待队列长度
     "Aria2cPath": "./lib/aria2c",