The invention relates to a smoke removing machine for welding. The smoke removing machine for welding comprises a purification main box, movable wheels, a smoke dust filter drum, a motor, a universal gas suction arm, a gas suction cover, a fixing flange and a switch and is widely applied to the fields of manufacturing of electronic and electrical products, LEDs, toys, precise hardware and automobiles, producing of furniture, electroplating, laser operation, manufacturing of various decorations, metal polishing, spraying, building, welding, medical care and the like.