One kind of illumination diode headlight mold train, it contains between the heat conduction, the radiation, and at least illumination of diode lamp grain two independence, this heat conduction is the connection in this and so on illumination diode lamps grain and this radiation, uses for this and so on illumination diodes in the transmitted light when produces heat energy conduction to this radiation. Because this and so on illumination diode lamp grains are the respective independence, therefore, when this and so on illumination diode lamp grain of any illumination diode lamp grains is not normal operates, the servicemen may easily illumination of diode lamp grain by be possible the normal operation to replace illumination of diode lamp grain this already not normal operation, saves services the time which this illumination diode headlight mold train must spend.