It is widely used for grading and screening materials in the following fields: mines, quarries, aggregate, high-way construction, building materials, chemical industry, and metallurgy and so on. Working Principle: Vibrating screen uses electric exciter as vibrating source; the material will be thrown around the screen, at the same time doing forward sports, in order to achieve the screening purpose. Material from the feeder evenly enters into the machine's feeding inlet, with multilayer sieves to produce various of products and unqualified products on the screen or under the screen, then discharging from the outlet respectively. It can be used in the automatic production line.