Abrasive grains are natural or artificial materials with particle shape and grinding ability, which play a role in grinding, grinding and polishing. With the development of science and technology, abrasives have become the most important materials used in manufacturing, national defense industry and modern high-tech industry. Abrasive grains can be made into different shapes and types of abrasive tools and grinding wheels, and can also be directly used to grind and polish workpieces.