The high frequency screen of our company has the features of small amplitude and high frequency of screening. Regarding to the working principle, it differs from the conventional screens. By means of breaking of the surface tension of slurry, together with small granularitys high speed vibration on sieve cover and accelerates the separating of large-density useful mines and increases the contacting probability of the materials smaller than output granularity and the sieve pore. Therefore, it creates good condition for separating materials, especially for the small size.