The double-layer water bath sterilization pot adopts hot water circulation sterilization, suitable for tightly packed food during sterilization，The starting point of heating is high and the speed is fast, which can quickly achieve the sterilization effect, improve food quality, and preserve the original flavor of the product to a large extent，The hot water in the process tank circulates every two minutes on average, with uniform temperature at all points and no dead corners. Rapid cooling, pour cold water into the process tank every two minutes，After each sterilization is completed, the hot water can be stored in the upper tank for future use, shortening the food heating time and improving work efficiency. The pot door adopts an inflatable silicone rubber sealing ring, which is reliable in sealing and has a long service life.