The results of the feasibility studies of allocation scheme of sieves in the screen shoe to improve performance are given. Inves-tigations were carried out in a pilot plant consisting of two-aspiration pneumatic sys-tem and screen shoe with a ball-cleaning of sieves, controlled vibration frequency and location in one tier of up to three sieves with a length of 0.99 m. Permissible unit stress were obtained for grains and sorting sieve for cleaning piles of winter wheat at the mill vibration amplitude of 0.03 m in and a frequency of 350 min-1.