The invention discloses a method for welding upper shells and exhaust pipes of a compressor. The upper shells (8) and the exhaust pipes (9) are positioned on welding clamps (3), a controller controls a rotating disc (2) to rotate to a welding station welding gun (7) to perform preheating and welding, and the welding gun (7) and the rotating disc (2) operate cooperatively to perform welding reasonably in order. By the application of the method for welding the upper shells and the exhaust pipes of the compressor, welding is performed conveniently and rapidly in order, welding performance is stable, the variability is small, leakage of the welded parts is reduced, and the welding quality of the welded parts is greatly improved.