With the development of society, more and more people pay attention to public health and travel safety. This design is specifically for the subway bus and other public travel traffic design of the existing handrail function is single, more restrictions. The design of the handrail cleaning problem to make a targeted design, the handrail can automatically clean the use of parts, the system is more friendly to the weak crowd. It can also adjust the use height according to different height users, eliminating the inconvenience of height factors.