Welding device for assembling fabricated building

The utility model relates to the technical field of assembly type building assembly welding, in particular to a welding device for assembly type building assembly, which comprises a welding device body, a hydraulic machine arranged at the bottom, a workbench arranged at one end of the hydraulic machine, a sliding groove formed in the surface of the workbench, a movable plate arranged in the sliding groove, and a welding mechanism arranged in the welding device body. The welding device has the beneficial effects that when the welding device for assembly of the fabricated building is used, a hydraulic machine arranged on the surface of the bottom plate can be used for ascending and descending the workbench so as to feed and take a workpiece needing to be welded, then the workpiece needing to be welded can be fixed through a positioning plate, and the welding efficiency is improved. The welding mechanism can be moved and adjusted by controlling the air cylinder, and therefore the problems that in the actual usin