Aim to the application of smart street lamp and internet of vehicles, a communication model of street lamp based on visible light-emitting diode （LED) is designed. Firstly, the illumination pre-equalization method of LED single channel stability and multi-channel stability is proposed, and the receiving effect is tested. Secondly, according to the installation methods of uni-lateral, bilateral symmetrical and bilateral asymmetric street lamps, the spatial illumination distribution mathematical models of three kinds of street lamps are constructed and simulated by Lambert model, and the average illumination in the near ground are a of the road is analyzed. Finally, the vehicle receiving model of visible light signal and the color division multiplexing (CDM) visi-ble light communication model from LED street lamp to vehicle are designed, and the signal receiving waveform of the model and the multipath effect of the model are analyzed.