The paper present the content of experimental investigation of the corn cleaner and screener with high capacity based on the experiments at the production facilities and the experimental planning model. The multi-factor experimental plan which includes three objective function: the biggest cleaning products and the lowest remnant product and broken grains through a screen determines five input optimal parameters. They are the productivity Q = 44.27 ton/h; humidity is 28.5%; the air flow ratio fan 4724.44m3/h and the rotation speed is 7 rpm; angle of inclination is 80. These results are completely consistent with the theoretical calculation results.

Keywords: Drum/rotary screen for corn classification; optimization; experimental plan.