Thermal sterilization is to seal the food in the container and put it in the sterilization equipment, heat it to a certain temperature and keep it for a period of time, the period is to kill the pathogenic bacteria, toxin-producing bacteria and spoilage bacteria in the food,and destroy the food The enzyme, as far as possible to maintain the original flavor, color, tissue shape and nutritional content of the food content, and meet commercial sterility requirements.