The utility model relates to an electrothermal sterilizing cabinet, which is reformed and inaugurated on the basis of a traditional sterilizing cabinet. The utility model adopts a magnetic temperature limiting switch in a push type and a device for automatically opening and closing an exhaust outlet. When the electrothermal sterilizing cabinet is used for sterilization, an electrothermal element is started to work by the magnetic temperature limiting switch; when the electrothermal element achieves certain temperature, the exhaust outlet can be automatically opened to exhaust gas and steam. When the sterilization is finished, a power source can be automatically closed; when the temperature in the sterilizing cabinet drops to the certain temperature, the exhaust outlet can be automatically closed to keep the inner part of the sterilizing cabinet sealed to prevent bacteria from entering the sterilizing cabinet from the exhaust outlet to cause pollution again. The electrothermal sterilizing cabinet which has a reasonable structure can be widely used for sterilizing food tools and appliances in families and public places.