This machine adopts the principle of blowing stone removal, using the specific gravity of materials and sand and other impurities and the difference in aerodynamic properties to mix sand and stones and metal blocks in the materials (rice, rice, wheat, beans,etc.) Separation and cleaning of impurities. The machine has the characteristics of small power, light weight, simple operation,no need to be fixed on the bracket, and can be moved and used at will. The stone removal effect reaches more than 98%.