The invention relates to a grain material optical color selector which comprises a discharge chute, an image collecting system, a blowing system as well as an information treating control system. The observing area of the image collecting system is arranged on a material moving track limited by the discharge chute; the information treating control system is respectively connected with the image collecting system and the blowing system in a signaling way used for identifying the grains with different colors according the image digital signals of the image collecting system and controlling the blowing system to carry out corresponding blowing actions. The blowing system is provided with a plurality of blowing nozzles; the blowing path of each blowing nozzle passes through the material moving track limited by the discharge chute; the crossing position of the blowing paths and the material moving track is arranged below the observing area of the image collecting system. The image collecting system preferentially selects a CCD camera of area array CCD imaging or linear array CCD imaging. The color selector has large treating amount, simple structure and accurate judgment to the grains with different colors, which can automatically remove the grains with different colors in the material and is mainly used for sorting the grain materials, such as rice, etc.