A bulletin board is disclosed, including a base, a mounting bracket, a billboard, a mounting pillar and a drive motor, the bottom end of the mounting bracket is removably mounted on the upper surfaceof the base, the mounting bracket is provided with a mounting groove at a position near the top of the mounting bracket. The bulletin board is vertically provided with mounting holes penetrating the bulletin board, the mounting columns are inserted into the mounting holes and fastened, the two ends of the bulletin board are pierced through the mounting holes, the upper and lower sides of the mounting slots are provided with fixing holes, the two ends of the mounting columns are inserted into the corresponding fixing holes respectively, and the bulletin board is fixed in the mounting slots. Thetop end of the mounting column penetrates out of the upper surface of the mounting bracket, the first gear is detachably mounted on the through end of the mounting bracket, the driving motor is mounted in the fixed groove on the top end of the mounting bracket, the second gear installed on the output end of the driving motor meshes with the first gear, and the mounting column is driven to rotate,and the bulletin board is driven by the mounting column to move circumferentially. The bulletin board is convenient to use, convenient to assemble, and can effectively remind people of all directions.