Cylindrical screen inclination according to the different materials within 4°-8° to adjust to obtain the best cleaning effect. Actuator compact axis direction, the screen is divided into three sections, each with three, while both sides open the inspection door, open the inspection door replacement screen, greatly reduced the intensity of change screen. On the edge of screen, equipped with high-strength hair brush can effectively clean up sieve clogging. Suitable for food, storage, food industry, chemical industry and other granular raw materials in the dressing room.