The color selection is mainly composed of corn grains color sorter, grains and so usually start work before, according to the corn material impurity rate and yield to set the color sorter work mode and other related parameters. After parameter setting, will be selected by lifting machinery into the corn color sorting machine into the hopper, the corn from the feed hopper by vibrating feeder for chute channel (i.e. color channel, the surface should be smooth without beating phenomenon) feeding. Rice plastic monolayer were listed speed uniform speed flow channel in the corn CHULIU chute channel, crashed into the CCD shot detection area. The birth of the color selection machine can save a lot of manpower and material resources for the grain sorting process, which brings great benefits for the food processing enterprises. The machine is widely used in many fields in Dalian province choose color, such as food industry, color of sesame peanuts, rice, soybeans and other grains to choose classification, classification of tea, some chemical industry (plastic sheet, plastic particles, salt, etc.) can also be used.