It is reasonable to leave a gap of 1.5-4mm above and below the revolving door; The revolving door combines the advantages of various doors, and its spacious and high-style design creates a luxurious atmosphere, which is the crowning touch of architecture. Because the revolving door has the function of normally opening and normally closing, it enhances the wind resistance and reduces the energy consumption of air conditioning. It is the best choice to isolate air flow and save energy. The development history was in Italy in the 1920s, when several double-wing doors were made. At that time, double-wing doors were designed to swing in two directions. Later, a Swedish revolving door manufacturer introduced a new double-wing door. They added a motor and a booth to the original design. There were also three-wing doors and four-wing doors.