There could be a great benefit if the rule of its establishment and tool as the technical method for improving the 400m relay record is used thoroughly. By using the right-left-right-left separate course baton touch method, if the runner third runner and fourth runner runs alone the inside of team course after running 15m from the start, he can lessen at least 48.98cm In the first course, and he can do also 55.56cm from the second course to the eighth course.