Barrier-free automatic lifting speed bump and control method

The invention discloses a barrier-free automatic lifting speed bump and a control method. The speed bump comprises a radar speed indicator, four guide rails, a speed reducing plate, four sliding wheels, a plurality of upper supporting rods, a plurality of lower supporting rods, a plurality of link rods, a left push-pull rod, a right push-pull rod, two groups of push-pull electromagnets, a plurality of push-pull springs, a thrust electromagnet, a plurality of thrust springs, a thrust rod and a control device. The barrier-free automatic lifting speed bump has no barrier to the normal running vehicles, and can forcibly decelerate the over-speed vehicles, so that the road running comfortableness and the running safety can be improved, the noise is reduced, the service life of a tyre is prolonged and the overhauling expense is reduced. In addition, the control method is simple and convenient.