diff --git a/Infrastructure/Extensions/StringExtension.cs b/Infrastructure/Extensions/StringExtension.cs
index 46c1baa..8df3173 100644
--- a/Infrastructure/Extensions/StringExtension.cs
+++ b/Infrastructure/Extensions/StringExtension.cs
@@ -106,5 +106,33 @@ namespace Infrastructure.Extensions
             return string.IsNullOrEmpty(str) ? str : str.Substring(0, 1).ToUpper() + str[1..];
         }
 
+        /// <summary>
+        /// 截取指定字符串中间内容
+        /// </summary>
+        /// <param name="sourse"></param>
+        /// <param name="startstr"></param>
+        /// <param name="endstr"></param>
+        /// <returns></returns>
+        public static string SubstringBetween(this string sourse, string startstr, string endstr)
+        {
+            string result = string.Empty;
+            int startindex, endindex;
+            try
+            {
+                startindex = sourse.IndexOf(startstr);
+                if (startindex == -1)
+                    return result;
+                string tmpstr = sourse.Substring(startindex + startstr.Length);
+                endindex = tmpstr.IndexOf(endstr);
+                if (endindex == -1)
+                    return result;
+                result = tmpstr.Remove(endindex);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("MidStrEx Err:" + ex.Message);
+            }
+            return result;
+        }
     }
 }