Special lifting appliance and lifting method for prefabricated box girder reinforcing mesh of high-speed railway

The invention provides a special lifting appliance for a high-speed railway prefabricated box girder reinforcing mesh and a lifting method, and the special lifting appliance comprises an upper lifting beam, a lower lifting beam, a lower lifting beam, an upper lifting beam and a lower lifting beam, wing beams are correspondingly hinged to the two sides of the middle hanging beam in the width direction; the lower lifting beam is located below the middle lifting beam, the width of the lower lifting beam is smaller than that of the middle lifting beam, and the lower lifting beam is connected to the upper lifting beam through a lifting driving piece; and the plurality of claws are correspondingly distributed on the middle hanging beam, the wing beams and the lower hanging beam so as to hang and take the reinforcing mesh. The railway prefabricated box girder reinforcement cage is decomposed into a plurality of reinforcement meshes and a plurality of steel belt meshes, the reinforcement meshes and the steel belt mes