WILA quenches the automobile injection mold and tempers it in an environment of 550°C, then polishes it smoothly with sandpaper and wipes it clean with alcohol to remove rust and oil on the surface, and place it in a dry and ventilated place; prepare 150 mesh iron-based self-fluxing alloy powder, The laser performs laser cladding; the oxide on the surface of the cladding layer after laser cladding is removed to complete the surface strengthening.