High-flatness aluminum plate welding device

The high-flatness aluminum plate welding device comprises a machine body support, material conveying rails, a position adjusting device and a welding assembly, the machine body support comprises a bottom plate base, the bottom plate base is connected with a pair of sliding rails through a supporting bottom frame, the two material conveying rails are connected between the two sliding rails, and each material conveying rail comprises a feeding roller way, a position adjusting plate area and a discharging roller way; a position adjusting device is arranged at the position, corresponding to the position adjusting plate area, of the material conveying rail. After an aluminum plate is conveyed to a position adjusting plate area by a feeding roller way, the aluminum plate is limited to be in a unified material conveying position by a limiting stop block arranged at the end part of a sliding seat, a position adjusting motor is controlled to drive a screw rod, so that a movable plate seat moves towards the inner side