High frequency sieve mainly consists of vibration generator, slurry distributor, deck base stander pendulum spring and screen. With small amplitude screening，high sieve frequency, high efficiency the principle of high-frequency sieve is different from other common sizing machinery. Adopted high frequency, high frequency sieve on the one hand, damages the tension of slurry surface and the high speed oscillation of screen surface, so that accelerate the density (weight) of useful minerals and the effect of parsing, thus increase the probability of the material which is less than separation of particle size to touch sieve pore. Consquently, a better separating condition is created, making materials smaller than separating granularity, especially materials and ore magma of large proportion permeate and become materials under the sieve.