diff --git a/Tiobon.Core.Common/Helper/DateHelper.cs b/Tiobon.Core.Common/Helper/DateHelper.cs
deleted file mode 100644
index 922fac66..00000000
--- a/Tiobon.Core.Common/Helper/DateHelper.cs
+++ /dev/null
@@ -1,55 +0,0 @@
-namespace Tiobon.Core.Common.Helper;
-
-public class DateHelper
-{
-    public static DateTime StampToDateTime(string time)
-    {
-        time = time.Substring(0, 10);
-        double timestamp = Convert.ToInt64(time);
-        System.DateTime dateTime = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);
-        dateTime = dateTime.AddSeconds(timestamp).ToLocalTime();
-        return dateTime;
-    }
-
-    public static string TimeSubTract(DateTime time1,DateTime time2)
-    {
-        TimeSpan subTract = time1.Subtract(time2);
-        return $"{subTract.Days} 天 {subTract.Hours} 时 {subTract.Minutes} 分 ";
-    }
-    /// <summary>
-    ///  时间戳转本地时间-时间戳精确到秒
-    /// </summary> 
-    public static DateTime ToLocalTimeDateBySeconds(long unix)
-    {
-        var dto = DateTimeOffset.FromUnixTimeSeconds(unix);
-        return dto.ToLocalTime().DateTime;
-    }
-
-    /// <summary>
-    ///  时间转时间戳Unix-时间戳精确到秒
-    /// </summary> 
-    public static long ToUnixTimestampBySeconds(DateTime dt)
-    {
-        DateTimeOffset dto = new DateTimeOffset(dt);
-        return dto.ToUnixTimeSeconds();
-    }
-
-
-    /// <summary>
-    ///  时间戳转本地时间-时间戳精确到毫秒
-    /// </summary> 
-    public static DateTime ToLocalTimeDateByMilliseconds(long unix)
-    {
-        var dto = DateTimeOffset.FromUnixTimeMilliseconds(unix);
-        return dto.ToLocalTime().DateTime;
-    }
-
-    /// <summary>
-    ///  时间转时间戳Unix-时间戳精确到毫秒
-    /// </summary> 
-    public static long ToUnixTimestampByMilliseconds(DateTime dt)
-    {
-        DateTimeOffset dto = new DateTimeOffset(dt);
-        return dto.ToUnixTimeMilliseconds();
-    }
-}
diff --git a/Tiobon.Core.Extensions/Authorizations/Policys/PermissionHandler.cs b/Tiobon.Core.Extensions/Authorizations/Policys/PermissionHandler.cs
index 4abb7123..96f7e0af 100644
--- a/Tiobon.Core.Extensions/Authorizations/Policys/PermissionHandler.cs
+++ b/Tiobon.Core.Extensions/Authorizations/Policys/PermissionHandler.cs
@@ -4,9 +4,9 @@ using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.DependencyInjection;
 using System.Security.Claims;
 using Tiobon.Core.Common;
-using Tiobon.Core.Common.Helper;
 using Tiobon.Core.Common.HttpContextUser;
 using Tiobon.Core.Common.Swagger;
+using Tiobon.Core.Helper;
 using Tiobon.Core.IServices;
 using Tiobon.Core.Model;
 using Tiobon.Core.Model.Models;