Anti-supporting shaking flat roller of walking type bridge girder erection machine

The utility model discloses a walking type bridge girder erection machine anti-supporting shaking flat roller, and relates to the technical field of bridge girder erection machines, the walking type bridge girder erection machine anti-supporting shaking flat roller comprises a slideway, a supporting structure and a compression resistance structure, the slideway is internally provided with a plurality of electric pulleys, the top ends of the electric pulleys are provided with mounting plates, the top ends of the mounting plates are provided with pneumatic telescopic rods, and the pneumatic telescopic rods are connected with the supporting structure. Movable plates are mounted at the top ends of the pneumatic telescopic rods correspondingly, second cavities are formed in the two sides of the interior of each movable plate correspondingly, second servo motors are mounted on the two sides of the front end of each second cavity correspondingly, and second bidirectional threaded rods are mounted at the output ends