The horizontal pressure sterilizer adopts the gravity displacement method to eliminate thecold air in the inner chamber, so that the content of cold air in the inner chamber steam is less and the sterilization is more reliable. At the same time, in the sterilization process of the equipment, the control system automatically adjusts the inletsteam and exhaust steam according to the temperature of the inner chamber. It is mainly used in hospital supply rooms, operatingrooms, pharmaceutical factories and laboratories of scientific research institutions for sterilization of cloth articles, surgicalinstruments and utensils for medical and experimental purposes