The invention discloses a rice screening device. The device comprises a bottom plate; a screening box is arranged above the bottom plate, a screen is arranged on the lower wall of the screening box, baffles are fixed at the upper ends of the two side walls of the screening box, and springs are fixed between the two sides of the lower end of the screening box and the bottom plate; a top plate is fixed under the two ends of the screening box, motors are fixed on the two sides of the upper end of the bottom plate, and cams are fixed on output shafts of the motors; vertical plates are fixed at thetwo ends of the bottom plate, a transverse plate is fixed at the upper ends of the vertical plates, and the lower end of the transverse plate is fixedly provided with a U-shaped supporting plate through connecting rods; the U-shaped supporting plate comprises U-shaped plate seats, two U-shaped protecting plates which are integrally formed with the U-shaped plate seats are symmetrically arranged on the outer side walls of the U-shaped plate seats, and U-shaped magnets are fixed on the inner side walls of the U-shaped seats; a conveying belt is arranged on the outer side walls of the U-shaped plate seats in a sleeve mode, the conveying belt is arranged between the two U-shaped protecting plates, and a plurality of rolling balls attached to the conveying belt are embedded in the outer side walls of the U-shaped plate seats; and a driving wheel is arranged at one end, opposite to the U-shaped plate seats, of the conveying belt, and the driving wheel is attached to the inner wall of the conveying belt. The rice screening device has the advantages of being good in screening effect and convenient to use.