Garnet sand is mined from high-quality garnet ore, which is rigorously washed, crushed and finely screened. It has sharp edges and other properties: high hardness, high density and toughness. The grains can penetrate deep into the cavities and pit areas of the metal. The working face after garnet blasting treatment has no embedded, no peaks and valleys. It is easy to obtain the ideal blasting level and surface roughness, which can effectively improve the adhesion of the coating and prolong the service life. Garnet sand has the characteristics of Mohs hardness 8.0, density 4.2g/cm3, sharp edge and high cutting efficiency. The sandblasting area per unit time is wider and the sand per unit area is less, which can further reduce the sandblasting cost. Garnet sand is that material: non-ferrous metals, 100% natural inert minerals and less than 1% free silica. At the same time, higher specific gravity and washed grains can widely meet different environmental requirements.