Subway shielding door self-cleaning device

The invention discloses a subway shielding door self-cleaning device. The self-cleaning device comprises a shielding door body movably mounted between an upper guide rail seat and a lower guide rail seat, elastic airbags and a brush head mechanism. Sealing chambers are arranged on the two sides of the upper guide rail seat and the lower guide rail seat. The elastic airbags are located in the sealing chambers, and the elastic airbags are cylindrical. The brush head mechanism comprises a brush plate, the brush plate is fixed between the upper guide rail seat and the lower guide rail set, a cavity is formed in the brush plate, and one side of the brush plate is fixedly connected with soft bristles. When a subway is driven into a platform, as an opening of an air inflow pipe is parallel to thewind direction, lateral wind is blown into the air inflow pipe, then airflow is inflated into the elastic airbags to be stored, air backflow is avoided through the arrangement of a one-way valve, wind power is buffered under