Provided is a solar LED warning board. The solar LED warning board is mainly used for safety warning in a construction site. The solar LED warning board includes a shell and is characterized in that the shell is hinged by a front plate and a rear plate, the front plate and the rear plate are respectively provided with solar panels, LED warning lights and controllers, and the hinged position of thefront plate and the rear plate is located at the tops of the front plate and the rear plate; the bottom of the rear plate is connected with an ABS plastic buckle, a plurality of clamping hooks are arranged on a plate face in the middle of the rear plate, and a supporting ring is hinged to the middle of the front plate. The solar LED warning board has the advantages of simple processing, low carbon and environmental protection, low manufacturing cost and easy operation.