The invention relates to a bus stop board chair with a self cleaning function, and belongs to the field of a municipal facility. The bus stop board chair consists of a chair body, a storage battery, an axial flow fan, a pressure barrel, a machine frame, a chute, a stepping motor, a fixing pile, a lead screw, a photoelectric switch, an electromagnetic valve, a controller, a slide block, a direct current motor, an air guide tube, a water suction roller, a spray hole, a cleaning guide pipe, a stroke roller and a roller installing cavity. Through the matching of the chute, the slide block and the stroke roller, the stable operation of the machine frame is ensured; through the matching of the cleaning guide pipe, the water suction roller and the axial flow fan, a complete cleaning system is formed. The device of the bus stop board chair has the advantages that the structure is compact; the service life is long; the problem of dirty chair of a bus stop board is solved, so that people can conveniently sit down to have a rest.