Mobile bulletin board

The utility model discloses a mobile bulletin board in the technical field of bulletin boards, which comprises an outer frame bracket, the outer frame bracket is arranged in a concentric-square-shaped structure, two ends of the outer frame bracket are arranged in a semicircular structure, the semicircular structures at the two ends of the outer frame bracket are detachably connected, and a movable inner cavity is formed in the inner wall of one end of the outer frame bracket; the end, away from the outer frame support, of the movable inner cavity penetrates through the outer frame support, a bottom plate is fixedly connected to the inner wall of the end, close to the outer frame support, of the movable inner cavity, a digital propaganda screen is fixedly connected to the side wall of the side, facing the opening end of the movable inner cavity, of the bottom plate, and an auxiliary propaganda screen is fixedly connected to the end wall of the side, close to the digital propaganda screen, of the bottom plate.