Color separators can be divided into rice color separators, grain color separators and tea color separators, among which rice color separators account for more than 80%, and grain color separators and tea color separators are new varieties developed in recent years. In recent years, the color sorter industry for grain sorting in China has developed very rapidly, which is related to that China has always been a large country in grain production and consumption. By the end of 2010, China's grain output had reached 546.41 million tons, an increase of 2.9% over the same period of 2009, and maintained a positive growth for seven consecutive years. At present, optoelectronic color sorters of foreign brands occupy the main share in the domestic market. In recent years, optoelectronic color sorters manufacturers independently researched and developed in China have also begun to be gradually applied. As a typical mechatronic system, the research and development of the photoelectric color separator control system is not only the main aspect of the innovative design of the color separator, but also the key technical aspect that determines whether the developed color separator can obtain excellent performance.