The invention provides a platform board with a vehicle speed monitoring device. The platform board comprises a platform board, a camera, a photographing device, a speed measuring radar, a radar reading device, a picture memory, a solar panel, a street lamp, a storage battery, a lamp post, a player, a control processor, a signal receiver, an LED display, and a bus indicator. The speed measuring radar monitors signals emitted by vehicles and then transmits signals to the radar reading device. The radar reading device transmits the converted vehicle speed data to the control processor. The control processor controls the camera and the photographing device. The camera is responsible for the real-time shooting. The photographing device photographs overspeed vehicles according to the instruction of the control processor, and then the photographed pictures of vehicles are finally transferred to the picture memory. According to the technical scheme of the invention, not only a bus route can be clearly displayed, but also a solar street lamp is additionally arranged. The function of prompting the pull-in time of a bus and other various functions are realized. Moreover, a vehicle speed monitoring device is arranged. Therefore, overspeed vehicles are effectively monitored and photographed, so that the traffic is safer. The lives of people are more convenient.