Accurate welding device for aluminum alloy doors and windows

The utility model discloses an accurate welding device for aluminum alloy doors and windows, which comprises a base and a top plate mounted above the base through a support rod, and a welding component is mounted on the top plate. Two symmetrically-arranged fixing boxes are installed on the base, a clamping and fixing assembly is arranged above the fixing boxes, the clamping and fixing assembly is supported through lifting rods, rod bodies, arranged in the fixing boxes, of the lifting rods are slidably connected to the inner walls of the fixing boxes, insections are formed in the rod bodies of the lifting rods, and the lifting rods are controlled to ascend and descend through the lifting assemblies. And a locking assembly is arranged on the clamping and fixing assembly. The lifting assembly controls the clamping assembly to ascend or descend to fix a door and window, the locking assembly is used for further fixing the door and window, the door and window is firmer, the situation that an aluminum alloy door an