Most of the current market of rice color sorter in impurity rate is 2% when the sorting accuracy can reach 99.99%. Removal of impurity rate will affect the color selection effect, the unit time is also one of the key factors of production, output and color precision is inversely proportional to the unit time, the greater the color selection effect is worse. Therefore, the color selection machine with two color selection functions can reduce the content of normal rice in the waste, and save manpower, material resources and time. Large Beige before the election, it should carry out polishing. After polishing treatment of rice, with less bran, surface clean white light, good mobility, is conducive to improve the color selection effect.