The principle of sterilization is that in a certain temperature range, the lower the temperature, the slower the bacteria reproduce; The higher the temperature, the faster the reproduction. But the temperature is too high and the bacteria die. Different bacteria have different optimal growth temperature and heat resistance and cold tolerance. Pasteurization is the characteristic that USES pathogens not very heat resistance, with appropriate temperature and heat preservation time processing, will all kill. Main drive motor drive up and down two floors to lose a bottle chain network will material after three temperature regions of preheating of warming step by step, and the sterilization of two temperature zone, and the three temperature regions step by step in the process of cooling and cooling.