diff --git a/mybatis-enhance-actable/src/main/java/com/gitee/sunchenbin/mybatis/actable/constants/MySqlTypeConstant.java b/mybatis-enhance-actable/src/main/java/com/gitee/sunchenbin/mybatis/actable/constants/MySqlTypeConstant.java
index 6d7f61a6eb37d61d9cbfab6970ba27ed11c42378..fe264484463bb84c8c939693175031c0ec83c880 100644
--- a/mybatis-enhance-actable/src/main/java/com/gitee/sunchenbin/mybatis/actable/constants/MySqlTypeConstant.java
+++ b/mybatis-enhance-actable/src/main/java/com/gitee/sunchenbin/mybatis/actable/constants/MySqlTypeConstant.java
@@ -100,4 +100,17 @@ public class MySqlTypeConstant {
 
 	@LengthCount(LengthCount=0)
 	public static final  String TINYBLOB = "tinyblob";
+
+	/**
+	 * 更新时间 ON UPDATE CURRENT_TIMESTAMP
+	 */
+	@LengthCount(LengthCount = 0)
+	public static final String UPDATE_TIMESTAMP = "timestamp ON UPDATE CURRENT_TIMESTAMP";
+
+	/**
+	 * 新增时间  DEFAULT CURRENT_TIMESTAMP
+	 */
+	@LengthCount(LengthCount = 0)
+	public static final String CREATE_TIMESTAMP = "timestamp DEFAULT CURRENT_TIMESTAMP";
+
 }