Dalian color sorting machine mainly comprises: feeding hopper, vibrating feeder, chute chute, light source, background plate, CCD detection, lens bin, jet nozzle, air compressor, air purifier and filter etc.. Photoelectric system: the photoelectric system is the core part of the color selector, mainly by the light source, the background plate, CCD lens and the auxiliary device. The light source provides a stable uniform illumination for the material being tested and the background plate. The experimental results show that the blue LED light source is the best light source.. Feeding system for remove color sorter provide candidate functions but also can realize the grain yield control of color sorter. According to the adjustment of the flow control plate and vibration hopper of the feed hopper, the control of the output of the unit time of the color selecting machine can be realized. How comprehensive study of color sorter performance and quality, so as to choose to the high performance price compared to the color sorting device, the user is not an easy thing, must be on the color sorter knowledge have a certain understanding.