Welding seam tracking method for pressing roller welding

The invention discloses a welding seam tracking method for suppressing roller welding. The welding seam tracking method is based on a welding seam tracking system of a two-dimensional laser sensing assembly, the two-dimensional laser sensing assembly acquires deviation data in real time and processes the deviation data in an array by adopting a first-in first-out storage algorithm and a comparison compensation mode. By adopting the first-in first-out data storage algorithm and the comparison compensation mode, the running paths of a welding gun on the Z axis and the Y axis can be tracked and compensated in real time, so that each welding step of the welding gun is compensated and corrected, the distance between the welding gun and a welding seam is ensured to be a specific height, the welding gun is also ensured to move along the welding seam, the phenomenon that an existing welding gun is prone to deviating from the welding seam in the welding process, so that the welding seam straightness and the suppressio