Welding equipment for prefabricated part production

The utility model discloses welding equipment for prefabricated part production, which structurally comprises a placing structure, a welding structure and a purifying structure, a prefabricated part is placed at the upper end of a placing plate, is pushed to move towards a moving frame under the action of rollers and stops moving at the position of a stopping block, and the above steps are carried out at the other end. Then a second electric push rod pushes a limiting plate to make the prefabricated part more accurate, then a first electric push rod pushes a movable push block downwards to make a welding head make contact with the connecting position, then a welding box works for welding, meanwhile, a driving motor works to make a sliding block move, and therefore the welding head moves to weld different positions of the welding head, manual welding is avoided, and the welding efficiency is improved. And during welding, the suction fan works, waste gas generated by welding is fed into the water tank for treat