Dalian sand blasting and shot blasting can improve the mechanical properties of parts. After sand blasting, mechanical parts can produce uniform and fine concave convex surfaces on the surface of parts, so that the lubricating oil can be stored, so as to improve the lubrication conditions, reduce noise and improve the service life of machinery. For some special-purpose workpieces, sandblasting can realize different reflection or matte at will. Such as the polishing of stainless steel workpieces and plastics, the polishing of jade, the matte surface of wooden furniture, the pattern pattern on the surface of frosted glass, and the texturing of cloth surface.