Intelligent monitoring and early warning height limiting rod

The utility model relates to the field of road vehicle height limitation, and particularly discloses an intelligent monitoring and early warning height limiting rod. The device comprises a height limiting rod, a laser emitting device, a PLC control system and a photosensitive element, during use, the laser emitting device always emits laser to the photosensitive element; the position of the laseris the highest position of the vehicle through which the height limiting rod can pass; the PLC control system is connected with the photosensitive element; the photosensitive element receives an optical signal from the laser emitting device and converts the optical signal into an electric signal; when the height of the vehicle exceeds the limit height; the laser is shielded by the higher part of the vehicle, the photosensitive element cannot receive the light signal, the PLC control system cannot receive the converted electric signal and then controls the red light to light up, and controls the broadcast to give out w