Abstract: Device for crushing foodstuffs. The device has a housing for a user hold; a motor installed inside the housing; a drum member has an inlet portion for introducing foodstuffs therein and an extended portion; an internal cylindrical member being formed with a plurality of screw knife-edges and being formed with a shoulder along a front portion thereof for blocking a sludge penetration; a screw member being formed with a transferring thread portion including cut portions for pre-crushing, and a crushing thread portion including jaws for increasing a frictional force; and a cap assembled to the drum member for fixing the internal cylindrical member. The internal cylindrical member and the screw member are surface treated for anti-fermentation. The foodstuffs are easily moved and crushed, resulting in a reliance of the defect-free structure, and the fermentation of the remaining sludge is restrained.