The machine mainly provides color selection of a series of grain and miscellaneous agricultural products such as soybeans, corn, broad beans, peanuts, coffee beans, pepper, chickpeas and so on. Working principle of the coarse grain color sorter: the selected material enters the machine from the hopper at the top. Through the vibration of the vibrator device, the selected material slides down the channel, accelerates to fall into the observation area in the sorting room, and passes between the sensor and the background plate. Under the action of the light source, according to the intensity and color change of the light, the system generates an output signal to drive the solenoid valve to work to blow out different color particles into the waste cavity of the receiving hopper, and the good selected materials continue to fall into the finished product cavity of the receiving hopper, so as to achieve the purpose of sorting.