In the grinding process, the ordinary corundum abrasive gradually becomes blunt and flat with the increase of the number of times. The self-sharpening ability is deteriorated, and a lot of heat is generated to easily wear the workpiece. SG abrasive has strong self-sharpness, and the particles can be used during the grinding process. Automatically detaches and re-exposures the new cutting edge so it remains sharp. Thereby, the friction heat caused by the passivation particles can be reduced, the clogging of the grinding wheel is greatly reduced, and the service life of the grinding wheel is prolonged.