Reciprocating compressor welding piston

A welded piston of a reciprocating compressor comprises end walls, a barrel, a boss, a reinforced rib and a support tile, wherein the barrel is a Hough-type barrel comprising two welded barrels with semi-circular lateral section, the two ends of the utility model are provided with no bent edges, the barrel is welded with the end walls, and the welded seams are arranged at the end parts of the barrel. The end walls on the two ends are respectively welded with the boss and the reinforced rib to form an integral body, and the reinforced rib is omega-shaped. With the device, the phenomenon that the transition rounded corners of the bent edges of the barrel of the piston easily break is avoided, fatigue fracture of the welded seams between the barrel and the end walls is prevented, and thereby the service life of the piston is remarkably prolonged, and simultaneously processing is simplified and material consumption is decreased.