This machine is applied to saw thread clearance during the course of making from quarto to super-large die cutting plate. Automatic saw blade-holding device is adopted in down clip, so it can hold saw blade quickly and effectively. Position of upper clip and angle of working table all can be adjusted flexibly, which enhance the conformability for sawing plate. Supper-large working table is adopted, and the surface is ground to mirror level, and equipped with air suspension system, which makes the operation of sawing large plate more conveniently. Equipped with brute mighty dust absorption system. It collects sawed powder, which makes the plate surface clear.