Anti-deformation excavator track beam welding tool

The utility model discloses an anti-deformation excavator crawler beam welding tool which comprises a base, and a first clamping mechanism used for fixing a beam head, a second clamping mechanism used for fixing a beam body and a third clamping mechanism used for fixing a beam tail are sequentially arranged on the base. The first clamping mechanism comprises a support, a positioning disc and a pressing disc. The support is connected to the base. The positioning disc is in a step shape, a through hole of a speed reducer mounting plate on the beam head is in sliding fit with a small-diameter section of the positioning disc, and a gap L is reserved between the speed reducer mounting plate and a step surface; the speed reducer mounting plate is pressed by the pressing disc so that the speed reducer mounting plate can be tightly attached to the step face of the positioning disc, and then the gap L between the speed reducer mounting plate and the step face is eliminated. When the track beam is used, the beam head i