There are many kinds of marking equipment for laser depth engraving, but only the laser marking machine can make the depth, and this depth can be adjusted. Generally, the workpiece can be marked with 0. 1 to 10mm, and the power can be deeper. In addition, the depth laser marking machine adopts indirect contact processing method, and its force is almost negligible, and the printing effect is also very beautiful. In addition, its light spot is extremely small and will not be deformed after marking.