This kind of retort sterilizer can be used for high-temperature and rapid sterilization of various foods. It is applicable to all high-temperature resistant packaging materials. The water spray form in the sterilizer makes the heat transfer faster and more uniform, shortens the sterilization time, thus achieving high temperature and short time sterilization effect, stabilizing the product quality and extending the shelf life of the product. It is widely used in food, beverage and canned food industries. Indirect, sterile cooling via a plate heat exchanger saves water and eliminates the need for water treatment chemicals.