the vertical pressure steam sterilizer is installed with an electrical heater, a timer, a pressure-temperature controller, a safety valve, a releasing valve, a pressure-temperature indicator, an alarm bell for finished sterilization and an instrument to automatically cut off the power of heater. It has the advantages of effective sterilization, convenient operation, safe, less electricity consuming and cheap. It is ideal equipment for clinics, scientific research institutes and other organizations to sterilizer surgical instruments, fabrics, glasses, culture media etc.