High-altitude sliding device for high-altitude bulk packaging of quadrangular pyramid net rack

The high-altitude sliding device comprises a U-shaped track, a sliding seat is arranged on the U-shaped track in a sliding mode, a plurality of protruding blocks are evenly distributed on the top face of the sliding seat at intervals, the same foamed aluminum plate is fixedly arranged on the surfaces of the protruding blocks and the top face of the sliding seat, a support is arranged above the sliding seat, and the supporting seat is arranged on the U-shaped track. The positions, corresponding to the protruding blocks, of the bottom faces of the supports are provided with grooves, the protruding blocks are inserted into the corresponding grooves, the foamed aluminum plates are fixedly connected with the grooves and the bottom faces of the supports, bearing seats are fixedly arranged in the middles of the top faces of the supports, spherical bearing grooves are formed in the top faces of the bearing seats, and first hydraulic cylinders are vertically and fixedly arranged on the portions, on the left side and t