All kinds of metal casting surface sand cleaning, black metal parts surface rust removal, stamping parts surface burrs and rough edges blunting, forging and heat-treated workpieces surface treatment, as well as spring surface oxide scale removal and surface grain refinement can be achieved through the shot blasting strengthening process of this series of equipment. Its application range is extremely wide, mainly including foundries, heat treatment plants, motor factories, machine tool parts factories, bicycle parts factories, power machine factories, automobile parts factories, motorcycle parts factories, non-ferrous metal die-casting factories, etc. After shot blasting treatment, the workpiece can obtain a good natural color of the material, and can also become the preceding process for blackening, bluing, passivation and other processes on the surface of metal parts. At the same time, it can provide a good base for electroplating, painting and other coatings. After shot blasting treatment with this machine, the tensile stress of the workpiece can be reduced, and the surface grain can be refined, thereby strengthening the surface of the workpiece and increasing its service life.