diff --git a/Falcon.SugarApi.Test/DateTimeExtendTest.cs b/Falcon.SugarApi.Test/DateTimeExtendTest.cs
index baa30b9..311cc09 100644
--- a/Falcon.SugarApi.Test/DateTimeExtendTest.cs
+++ b/Falcon.SugarApi.Test/DateTimeExtendTest.cs
@@ -81,5 +81,15 @@ namespace Falcon.SugarApi.Test
             Assert.IsTrue(r.Second == 0);
 
         }
+
+        /// <summary>
+        /// 时间格式转换测试
+        /// </summary>
+        [TestMethod]
+        public void DateToFormatTest() {
+            var d = new DateTime(2022, 1, 4, 2, 40, 25);
+            var s = d.ToyyyyMMdd();
+            Assert.IsTrue(s == "20220104");
+        }
     }
 }
diff --git a/Falcon.SugarApi/DateTimeExtend.cs b/Falcon.SugarApi/DateTimeExtend.cs
index 7ad4604..4aa4bee 100644
--- a/Falcon.SugarApi/DateTimeExtend.cs
+++ b/Falcon.SugarApi/DateTimeExtend.cs
@@ -9,6 +9,7 @@ namespace Falcon.SugarApi
     /// </summary>
     public static class DateTimeExtend
     {
+        #region 获取某个时间
         /// <summary>
         /// 获取日期在某个时间段内的某一天
         /// </summary>
@@ -78,6 +79,18 @@ namespace Falcon.SugarApi
         public static Calendar GetDefaultCalendar(this DateTime dateTime) {
             return CultureInfo.CurrentCulture.Calendar;
         }
+
+        #endregion
+
+        #region 获取某个时间格式
+        /// <summary>
+        /// 获取时间的yyyyMMdd表示形式
+        /// </summary>
+        /// <param name="date">时间</param>
+        /// <returns>yyyyMMdd格式时间</returns>
+        public static string ToyyyyMMdd(this DateTime date) => date.ToString("yyyyMMdd");
+
+        #endregion
     }
 
     /// <summary>