Skirt welding tool

The utility model relates to the field of tools, and discloses a skirt edge welding tool which comprises a frame, two supporting plates are fixedly arranged in the frame, a first clamping plate and a second clamping plate are arranged on the outer sides of the two supporting plates in a sliding and sleeved mode respectively, a moving hole is formed in the top of the second clamping plate, a plurality of rectangular grooves are formed in the top of the lower supporting plate, and the rectangular grooves are communicated with the first clamping plate and the second clamping plate. A rectangular clamping block clamped with the rectangular groove is in sliding contact with the interior of the moving hole, a stress plate is fixedly arranged on the side face of the rectangular clamping block, a side hole is formed in the side wall of the moving hole, a connecting groove is formed in the inner wall of the top of the side hole, a spring is connected between the stress plate and the inner wall of the top of the connec