diff --git a/EasyTool.Core/CodeCategory/DesUtil.cs b/EasyTool.Core/CodeCategory/DesUtil.cs
index 2f9332c..94e350f 100644
--- a/EasyTool.Core/CodeCategory/DesUtil.cs
+++ b/EasyTool.Core/CodeCategory/DesUtil.cs
@@ -7,6 +7,9 @@
 
 namespace EasyTool.CodeCategory
 {
+    /// <summary>
+    /// DES工具类
+    /// </summary>
     public static class DesUtil
     {
         /// <summary>
@@ -20,7 +23,7 @@ public static class DesUtil
         /// <returns></returns>
         public static string Encrypt(string str, string sk, CipherMode cipher = CipherMode.ECB, PaddingMode padding = PaddingMode.PKCS7, Encoding? encoding = null)
         {
-            if (string.IsNullOrEmpty(str)) return string.Empty;
+            if (string.IsNullOrWhiteSpace(str)) return string.Empty;
             if (!IsLegalSize(sk)) throw new ArgumentException("不合规的秘钥，请确认秘钥为8位的字符");
             encoding ??= Encoding.UTF8;
             byte[] keyBytes = encoding.GetBytes(sk).ToArray();
@@ -47,7 +50,7 @@ public static string Encrypt(string str, string sk, CipherMode cipher = CipherMo
         /// <returns></returns>
         public static string Decrypt(string str, string sk, CipherMode cipher = CipherMode.ECB, PaddingMode padding = PaddingMode.PKCS7, Encoding? encoding = null)
         {
-            if (string.IsNullOrEmpty(str)) return string.Empty;
+            if (string.IsNullOrWhiteSpace(str)) return string.Empty;
             if (!IsLegalSize(sk)) throw new ArgumentException("不合规的秘钥，请确认秘钥为8位的字符");
             encoding ??= Encoding.UTF8;
             byte[] keyBytes = encoding.GetBytes(sk).ToArray();
@@ -62,6 +65,67 @@ public static string Decrypt(string str, string sk, CipherMode cipher = CipherMo
             return encoding.GetString(resultArray);
         }
 
+
+
+        /// <summary>
+        /// des 加密
+        /// </summary>
+        /// <param name="str">待加密字符串</param>
+        /// <param name="sk">秘钥</param>
+        /// <param name="iv">向量Iv</param>
+        /// <param name="cipher">默认ECB</param>
+        /// <param name="padding">默认PKCS7</param>
+        /// <param name="encoding">默认UTF8</param>
+        /// <returns></returns>
+        /// <exception cref="ArgumentException"></exception>
+        public static string Encrypt(string str, string sk,string iv, CipherMode cipher = CipherMode.ECB, PaddingMode padding = PaddingMode.PKCS7, Encoding? encoding = null)
+        {
+            if (string.IsNullOrWhiteSpace(str)) return string.Empty;
+            if (!IsLegalSize(sk)) throw new ArgumentException("不合规的秘钥，请确认秘钥为8位的字符");
+            if (!IsLegalSize(iv)) throw new ArgumentException("不合规的IV，请确认IV为8位的字符");
+            encoding ??= Encoding.UTF8;
+            byte[] keyBytes = encoding.GetBytes(sk).ToArray();
+            byte[] toEncrypt = encoding.GetBytes(str);
+            var des = DES.Create();
+            des.Mode = cipher;
+            des.Padding = padding;
+            des.Key = keyBytes;
+            des.IV = keyBytes;
+
+            ICryptoTransform cTransform = des.CreateEncryptor();
+            var resultArray = cTransform.TransformFinalBlock(toEncrypt, 0, toEncrypt.Length);
+            return Convert.ToBase64String(resultArray);
+        }
+
+        /// <summary>
+        /// Des 解密
+        /// </summary>
+        /// <param name="str">待解密字符串</param>
+        /// <param name="sk">秘钥</param>
+        /// <param name="iv">向量Iv</param>
+        /// <param name="cipher">默认ECB</param>
+        /// <param name="padding">默认PKCS7</param>
+        /// <param name="encoding">默认UTF8</param>
+        /// <returns></returns>
+        /// <exception cref="ArgumentException"></exception>
+        public static string Decrypt(string str, string sk, string iv, CipherMode cipher = CipherMode.ECB, PaddingMode padding = PaddingMode.PKCS7, Encoding? encoding = null)
+        {
+            if (string.IsNullOrWhiteSpace(str)) return string.Empty;
+            if (!IsLegalSize(sk)) throw new ArgumentException("不合规的秘钥，请确认秘钥为8位的字符");
+            if (!IsLegalSize(iv)) throw new ArgumentException("不合规的IV，请确认IV为8位的字符");
+            encoding ??= Encoding.UTF8;
+            byte[] keyBytes = encoding.GetBytes(sk).ToArray();
+            byte[] toDecrypt = Convert.FromBase64String(str);
+            var des = DES.Create();
+            des.Mode = cipher;
+            des.Padding = padding;
+            des.Key = keyBytes;
+            des.IV = keyBytes;
+            ICryptoTransform cTransform = des.CreateDecryptor();
+            var resultArray = cTransform.TransformFinalBlock(toDecrypt, 0, toDecrypt.Length);
+            return encoding.GetString(resultArray);
+        }
+
         private static bool IsLegalSize(string sk)
         {
             if (!string.IsNullOrEmpty(sk) && sk.Length == 8)
@@ -69,5 +133,6 @@ private static bool IsLegalSize(string sk)
 
             return false;
         }
+
     }
 }