Vibrating feeder is designed based on the vibration principle. It creates vibration when the materials are passed into the funnel and screen. Vibrating feeder is made up of vibrating frame, vibrator, spring, motor and motor vibrating accessory. The vibrator contains two fixed eccentric shafts with jogged gears. And they create a high aptitude to vibrate the equipment.The electromotor drives the eccentric block of the exciter to rotate with high speed through the v-shaped belt. The eccentric block can produce big eccentric force, and the exciting screen box will do circular motion with certain amplitude. The materials on the slant screen will be influenced by the impulse transmitted from the screen box and do continuous throwing motion, and the materials smaller than the screen hole will go through the screen, thus realizing classifying.