The exterior surface of the steel fireproof door is treated by electrostatic spraying, and the pulley, track and other easily worn accessories are high-quality hardware. The number of uses has passed strict testing, and then the service life of the product is ensured. The steel fire door only needs to be pushed open by hand, and then it will be closed quietly and automatically, without the noise of knocking like opening the door inside and outside, and then create a quiet environment.