The steel shutter door machine is mainly composed of door body, drive system, control system and auxiliary device. The door body is made of type steel, with high strength and corrosion resistance, and can withstand large wind pressure and impact force. The drive system is usually electric and manual. Electric drive system is composed of motor, reducer and transmission device, which can realize the automatic switch of the door body; the manual drive system can switch through manual operation. The control system is responsible for receiving and executing the operation instructions of the door machine, including limit, speed regulation and fault diagnosis. Auxiliary devices include door body balance system, safety protection device, etc., to ensure the safety and reliability of door machine operation. The steel shutter door machine is compact structure, convenient installation and is widely used in commercial, industrial and residential areas.