Aluminum alloy machine shell welding tool

The utility model discloses an aluminum alloy machine shell welding tool which comprises water nozzles used for fixing water nozzle inner jacking columns and an inner cavity jacking plate used for fixing an aluminum alloy motor shell, the two water nozzles are symmetrically installed on the inner side face of a cavity vertical plate, and second push rod fixing columns are correspondingly arranged on the outer side face of the cavity vertical plate. The second push rod fixing column is provided with two second bull eye hydraulic push rods used for fixing the cavity vertical plate, and the side face, away from the water nozzle, of the aluminum alloy motor shell is provided with an inner cavity top plate in a matched mode. Through the combination of the inner hole (inner cavity) top plate and the cavity and the positioning of the positioning pin hole, a water nozzle or a part is accurately fixed, and the position accuracy of the water nozzle or the part is ensured; by replacing the types of the inner hole (inner