This is a rigid construction sieve for separation fines or impurities from the required products such as to separate fines and cakes from animal feed pellets or separate ropes and impurities from grain. It is a genes design to slide the screen decks into screen chamber in an angle of 15 to 20 degree and drive by the two vibro-motor at two side to create vibration and help the materials spreading out and flow through the screen fast and clean separation.