The utility model provides a regulation formula article placing rack suitable for traffic device, including the carriage, the positive fixedly connected with backup pad in carriage, the lagging has been cup jointed on the surface of backup pad, the inner wall fixedly connected with of lagging is located the positive board that holds of backup pad, the inside of the rear end swing joint of board inthe backup pad holds, the inside swing joint who holds the board has transfer line and transmission piece, the transmission piece is located the both sides of transfer line, and transmission piece and transfer line swing joint, and one side fixedly connected with connecting rod of transfer line is kept away from to the transmission piece. The utility model discloses a set up backup pad, lagging,hold the board, transfer line, transmission piece, connecting rod, stopper, spacing groove, hold piece, inserted bar, slot, accept piece and pressure spring, reached and to have adjusted the effect that the rack supported the area to people can be put great article on the rack, make that article are difficult to fall down from the rack, thereby it uses to be convenient for people.