Bridge safety support and mounting method thereof

The invention relates to the technical field of bridge engineering, in particular to a bridge safety support and an installation method thereof.The bridge safety support comprises a chassis, a sliding base is arranged in the chassis, a polyfluortetraethylene plate is arranged on the sliding base, a slider is arranged on the sliding base, and the slider comprises a plurality of circumferentially-distributed sliding holes formed in the sliding base and the polyfluortetraethylene plate; a sliding hole is formed in the base plate, a sliding block is arranged in the sliding hole in a sliding mode, a supporting spring is arranged between the bottom of the sliding block and the base plate, a ball is rotationally placed at the upper end of the sliding block, and a limiting sleeve with the diameter smaller than that of the ball is arranged at the upper end in the sliding hole. The displacement of the bridge can drive the pressing plate to move on the polyfluortetraethylene plate, the pressing plate can rub with the ba