Adjustable welding frame supporting leg for steel structure welding

The utility model relates to the technical field of steel structure machining, in particular to an adjustable welding frame supporting leg for steel structure welding, which comprises a bottom plate, a base is arranged in the middle of the top end of the bottom plate, a supporting column is arranged on the base, and long-strip-shaped holes are formed in the front side wall face and the rear side wall face of the supporting column in a penetrating manner. A hydraulic oil cylinder is detachably arranged in the middle of the top end of the base and located in the supporting column, a top plate is arranged at the driving top end of the hydraulic oil cylinder, connecting plates are arranged on the outer walls of the front side and the rear side of the top plate, the outer walls of the connecting plates penetrate through and extend out of the long-strip-shaped holes, a supporting rod is arranged at the top end of the top plate, and the top end of the supporting rod extends out of the supporting column. According to