Circular vibrating screens, also called circular-motion vibrating screens, are used to classify medium to coarse-grained bulk materials (5.0 mm to 100 mm) for screening. Circular vibrating screens operate using indirect excitation of the screen mesh. The entire screen frame is driven by unbalance masses, which produce a circular vibrating motion. The vibrating screen is widely used in the classification of mines, building materials, transportation, energy and chemical industries. The utility model is mainly composed of a sieve box, a screen mesh, a vibrator and a damping spring.