The invention discloses a height-adjustable environmental protection knowledge explanation board, which comprises an explanation board body, an operation box is arranged under the explanation board body, a base is arranged at the bottom of the inner cavity of the operation box, and the top of the base is fixed A motor is connected, the output end of the motor is sleeved with a turntable, a connection plate is provided on the front of the turntable, a chute is opened on the surface of the connection plate, a cylinder is fixedly connected to the front of the turntable, and the cylinder Rollers are socketed on the surface. In the present invention, the operation box, the base, the motor, the turntable, the column, the roller, the connecting plate, the chute, the supporting rod, the limiting plate, the sliding rail, the limiting block, the pulley, the connecting column, the bearing plate and the bearing rod are used in cooperation. , solve the problem that the existing explaining board does not have the function of adjusting the height, avoid the situation that the height of the explaining board cannot be adjusted according to the height of the user when the user is using it, and facilitate the use of the user.