The invention relates to a badminton court marked-line switching system. The badminton court marked-line switching system comprises a singles court marked line, a doubles court marked line and a switch element. The singles court marked line and the doubles court marked line are white when not turned on and are in colors the same as that of environment badminton flooring when turned on. When the switch element receives a doubles command, the singles court marked line is turned on, and the doubles court marked line is turned off; when the switch element receives a singles command, the doubles court marked line is turned on, and the singles court marked line is turned off. When doubles is carried out, only the singles court marked line is turned on, the turned-on singles court marked line has the color the same as that of the environment badminton flooring and can not be easily observed, the non-turned-on doubles court marked line is white, and therefore users can only observe the white doubles court marked line. When singles is carried out, only the doubles court marked line is turned on, the turned-on doubles court marked line has the color the same as that of the environment badminton flooring and can not be easily observed, the non-turned-on singles court marked line is white, and therefore the users can only observe the white singes court marked line.