The fully automatic double-layer sterilization pot adopts a hot water circulation sterilization method, suitable for tightly packed food during sterilization. The heating starting point is high and the speed is fast, which can quickly achieve the sterilization effect, improve the quality of food, and preserve the original flavor of the product to a great extent. The hot water in the process tank is circulated every two minutes on average, with uniform temperature at each point and no dead corners. The cooling is rapid, and the cold water is injected into the process tank every two minutes. After each sterilization is completed, the hot water can be stored in the upper tank for next 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. It is equipped with a safety interlock device. The fully automatic double-layer hot water circulation high-temperature and high-pressure sterilization pot accurately controls the temperature, pressure, and sterilization time in the entire sterilization process.