This machine is an ideal equipment for cleaning and removing impurities from grains during grain purchasing and storage. It is also a device for grain processing and cleaning in grain and oil processing enterprises. By changing the screen mesh, different grains can be cleaned. This equipment is equipped with an additional dust removal device, which can enhance the efficiency of impurity removal and reduce dust pollution. It can work outdoors under local climate and environmental conditions, and continuously, stably and reliably remove impurities from grains under load.