diff --git a/Falcon.SugarApi/DateTimeExtend.cs b/Falcon.SugarApi/DateTimeExtend.cs
index aecb7cb..992cc7e 100644
--- a/Falcon.SugarApi/DateTimeExtend.cs
+++ b/Falcon.SugarApi/DateTimeExtend.cs
@@ -32,6 +32,14 @@ namespace Falcon.SugarApi
                 throw new NotSupportedException("不支持这个日期查询");
         }
 
+        /// <summary>
+        /// 获取当天的开始时间
+        /// </summary>
+        /// <param name="date">当天时间</param>
+        /// <returns>当天开始时间</returns>
+        public static DateTime GetStartOfToday(this DateTime date) {
+            return new DateTime(date.Year,date.Month,date.Day,0,0,0);
+        }
 
         /// <summary>
         /// 返回本周的第一天的日期。默认星期一为第一天