Mineral granulator has three discharge ports which facilitate intermittent production, and the work efficiency is improved while the labor intensity is greatly cut down. Soft belt transmission is adopted for the granulator and motor, it ensures stable starting and relieves the impact force, so the equipment life is prolonged. Meanwhile, the bottom of granulating disc is reinforced with many steel plates, thus, it is sturdy, durable and won't change its shape. In addition, the firm base is thickened and weighted which guarantees the stable running, and anchor bolt is not needed.