The angle of the granulating disc of the disc granulator adopts an overall arc structure, and the granulation rate can reach more than 93%. The pelletizing tray is equipped with three discharge ports, which is convenient for intermittent production operations, greatly reduces labor intensity and improves labor efficiency. The reducer and the motor are driven by flexible belts, which can start smoothly, reduce the impact force of the buffer, and increase the service life of the equipment. The bottom of the pelletizing disc is reinforced with multiple radiant steel plates.