Mold polishing has two purposes; one is to increase the smoothness of the mold, so that the surface of the mold products clean, beautiful, beautiful, the other is to make the mold is easy to demoulding, so that the workpiece is not glued to the mold and not off. Advanced Mold Polishing is by the fluid polishing machinery for non-contact flexible grinding cutting, polished die workpiece convex part of the smooth surface of the micro-mirror polishing method, using the technology can achieve ra0.008μm surface roughness, mirror processing standards are divided into four levels: ao=ra0.008μm,a1= ra0.016μm,a3=ra0.032μm,a4=ra0.063μm.