Cassava grater machine, cassava grating machine, cassava grinder, cassava grinding machine for cassava flour and garri processing. Cassava grater machine adopts two level pulverizing, the first level is rasp-type pulverizing, and the second level is hammer-type pulverizing, the combination of two levels sufficiently makes up their individual defects. It can be used for grating raw materials such as cassava, potato, sweet potato, yam etc. The efficiency can be improved by 45%-90% comparing to universal hammer mill