The roller type wear testing machine mainly consists of a power system, a rotating roller, a sample gripper, an automatic shutdown system, a rack and pinion gear device for sample rotation, a base, and a dust collector. The main principle is: under a certain load, on a certain level of gauze, a cylindrical sample is cross cut and ground on the surface of the gauze for a certain stroke. The mass wear of the sample is measured, and the volume wear is calculated from the density