The invention discloses a rice polishing device. The rice polishing device comprises a rice inlet hopper, a left rice inlet pipe, a right rice inlet pipe, a spraying device, a polishing box, four polishing roll devices, a driving motor, a fixing rack and a support frame; the two ends of the rice inlet hopper are arranged at the upper end of the polishing box through the fixing rack, the left side of the bottom end of the rice inlet hopper is connected with the left side of the top end of the polishing box through the left rice inlet pipe, and the right side of the bottom end of the rice inlet hopper is connected with the right side of the top end of the polishing box through the right rice inlet pipe; the spraying device is arranged between the left rice inlet pipe and the right rice inlet pipe; the left end of the spraying device is connected with the left rice inlet pipe, and the right end of the spraying device is connected with the right rice inlet pipe; the left end inside the polishing box and the right end inside the polishing box are each provided with two polishing roll devices; the bottom end of the polishing box is supported by the support frame. The rice polishing device is good in polishing effect and high in polishing efficiency, can effectively remove impurities such as rice bran in polished rice, is rich in function, high in practicability and easy to use, and can effectively improve the processing efficiency and the quality of the rice.