High frequency screen consists of vibration exciter,ore pulp distributor,screen frame,machine frame,suspension springs and sieve,etc.it differs from the conventional screens with breaking of the surface tension of pulp and small granularity high speed vibration on sieve cover and accelerates the separating of large -density useful mines and increase the contacting probability of the materials smaller than output grnularitu and the sieve pore.therefor produce good condition and make he materials smaller than the outpput granularity,especialy the big -density materials and pulp get through the sieve pore together.