The invention relates to a screening device, in particular to an efficient screening device for corn seeds. The technical purpose refers to that the efficient screening device for corn seeds is high in separating speed and efficiency and convenient and flexible to adjust. In order to realize the technical purpose, the efficient screening device for corn seeds comprises a bottom board, a support, a sliding rail, a collection case I, a collection case II, an iron screening box, a sliding block, a rack, a sector gear, an
electromagnet, a string, an arc-shaped connecting rod, a supporting rod, a rotary motor, a
barrel cam, a milling groove, a clamping block, an L-shaped guide board, a bearing pedestal I, a gear motor, a winding drum, a bearing pedestal II, a top board, a
servo motor, a bearing pedestal III, a nut, a bearing pedestal IV, a fixing board, a rotary shaft and a lead screw. The support, the sliding rail, the collection case I and the collection case II are sequentially arranged on the top of the bottom board from left to right. The efficient screening device for corn seeds has the effects of being high in separating speed and efficiency and convenient and flexible to adjust.