Pressure steam sterilizer

The utility model discloses a pressure steam sterilizer which comprises a steam generator, a sterilization pot is fixedly installed on the upper portion of the steam generator, a pot cover is fixedly installed on the upper portion of the sterilization pot through a locking assembly, a sterilization cavity is formed between the pot cover and the sterilization pot, the bottom of the sterilization pot is hollow, and a net disc is placed in the hollow position of the bottom of the sterilization pot in an embedded mode. A plurality of screw holes are formed in the upper portion of the net disc, and supporting frames are movably connected to the screw holes of the net disc in a screwed mode. The upper part of the sterilization pot is tightly fixed with the pot cover through the locking component to form a closed sterilization cavity. A user can install a plurality of supporting frames on the net plate at intervals according to the size and the shape of a vessel. Then, the glassware to be sterilized is placed on the