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Steel purification door refers to a door that is used in conjunction with clean room engineering, characterized by meeting the basic requirements of clean room standards, such as non decay, low dust accumulation, easy cleaning, and no dead corners. The steel purification door is designed for easy cleaning and disinfection of doors in clean rooms, with no dead corners. The door frame is made of 1.5mm thick color steel plate or stainless steel, and the door panel is made of 1.0-0.9mm thick carbon steel plate or stainless steel. The intermediate material includes flame-retardant paper honeycomb, aluminum honeycomb, rock wool, etc. The door panel and door frame are equipped with self-adhesive sealing strips, and the bottom of the door is equipped with a lifting sweeping strip, which can guarantee the sealing performance of doors in clean areas of different grades.