Grain cleaning machine (also called Grain Pre Cleaner) is the important grain cleaners, it is designed and manufactured by Shelley Engineering for simple, fast removal of light and heavy (rubble) impurities from grain, corn, soybeans, wheat, rice or fuel whose particles sizes and weighs are different than impurity particle, all the grain and the impunity dust are inputed into the rotating screen cylinder,The inner mesh and the out mesh have different diameters, the grains are isolated and flow out through different exit from the dusts in the continuous screening process. The grain cleaner can also be used for screening soybean meal, soybean meal blocking the bulk through continuous rotation, making the soybean meal block decreasing in monocular state.This kind of grain cleaning equipment reduces the emission of dust into the atmosphere.