The machine is used for processing and classifying materials according to the principle of generating different sliding friction coefficients and the rolling friction coefficients of materials according to different material shapes and proportions under the effect of gravity acceleration. The longitudinal and transverse inclination angles can be adjusted arbitrarily. Stepless speed regulation is especially suitable for round grain type, and it has especially excellent processing effect to soybeans. The following irregular grain shapes can be selected at a time such as: stones, sand, broken grains, etc.
