The invention discloses a self-cleaning outdoor advertising board. The self-cleaning outdoor advertising board comprises a main rod, a lower fixing plate and an upper fixing plate, the lower fixing plate and the upper fixing plate are fixedly connected to the side wall of the main rod, an advertising board body is fixedly connected between the lower fixing plate and the upper fixing plate, a through hole is formed in the upper end of the main rod, and net plates are arranged at two openings of the through hole. An impeller, a magnetic sliding plug, a wiping mechanism, a spiral coil and a magnetic rod are arranged, when the wind power is large, the wind power drives the impeller to rotate, the magnetic sliding plug is pushed to slide up and down by magnetic force, and an elastic balloon isinflated and expanded, so a sliding ring is driven by a sliding block to slide along a fixed plate, a cleaning brush wipes the surface of the advertising board without manual cleaning, the danger thatthe advertising board is prone to falling off during manual cleaning is avoided, and the labor intensity of cleaning personnel is reduced; and meanwhile, colored lamps can emit light when the magnetic sliding plug slides, the attraction of the advertising board is enhanced, and the better advertising effect is achieved.