A 3D-slanted roll crusher includes a housing, a number of driving devices mounted to the housing, a base mounted to an end of the housing away from the driving devices, a number of groups of grinders, a number of grinding teeth mounted on each of the grinders, and a number of material obstructing bodies mounted on an inner wall of the housing. The grinders correspond to the driving members one-to-one. Each grinder is connected to the base and the corresponding driving device. The grinders are spaced equally apart within the housing around a central axis of the housing and slantedly mounted on the base facing the driving devices.