The selected materials of the salt color separator enter the machine from the hopper on the top. Through the vibration of the vibrator device, the selected materials slide down along the channel, accelerate to fall, enter the observation area in the sorting room, and pass 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. Vibrating feeder for even and stable feeding. Both the slide and the lamp are equipped with heating plates, which can adjust the most suitable working temperature. The use of high-performance integrated blocks can greatly reduce the failure rate and save power consumption. The stainless steel receiving bin can prevent the equipment from rusting, insects and mildew caused by the moisture of rice bran. The circuit and optical components adopt a fully sealed structure to achieve a dust-free working environment and ensure the stable operation of the equipment.