Shaping tool for welding main beam and bearing rail beam of portal rail-mounted gantry crane

The utility model relates to the technical field of hoisting equipment, and provides a shaping tool for welding a main beam bearing rail beam of a portal rail-mounted gantry crane, which comprises a plurality of jacks for supporting the shaping tool, the plurality of jacks are propped against the same section of steel structure on the shaping tool, the bottom of the steel structure is connected with a plurality of supporting legs, and the supporting legs are also provided with baffle plates. The bottoms of the supporting legs are connected with limiting devices, the side walls of the rail bearing beams make contact with the limiting devices, and the distance between the limiting devices and the blocking pieces is not smaller than the height of the side walls of the rail bearing beams. The device overcomes the defects in the prior art, is reasonable in design, can extrude the overlapped part of webs of the bearing rail beam and the main beam by jacking the same section of steel structure through the jack, impr