Road maintenance construction speed limit warning device

The utility model relates to a road maintenance construction speed-limiting warning device which comprises a bottom plate, supporting legs on the two sides of the bottom plate and a warning board, a connecting plate is arranged at the ends, connected with the warning board, of the supporting legs, a rotating shaft is arranged on the connecting plate, limiting plates are arranged on the connecting plate on the two sides of the rotating shaft, and the warning board is rotationally connected with the rotating shaft through a bearing. A rotating motor is fixed to the connecting plate below the rotating shaft, an eccentric wheel is connected to the output end of the rotating motor, a pressing plate and a compression spring are arranged on the right side of the eccentric wheel, one end of the compression spring is fixedly connected with the limiting plate, the other end of the compression spring is connected with the pressing plate, and the eccentric wheel and the pressing plate are located on the left side and the