Light brightness regulator for vehicle

The utility model belongs to technique field of the adjustable electricity consumption device used for lighting the coming path. The vehicle lighting brightness adjusting device comprises a power supply switch circuit, a brightness adjusting circuit and a light control circuit connected on the power supply switch circuit, a pulse generating circuit connected on the light control circuit, a load HL1 and a load HL2 connected between the brightness adjusting device and the lighting control circuit. The vehicle lighting brightness adjusting device can compensate for the extra light absorbed by the road surface and maximize the vision distance by reinforcing the lighting brightness when the vehicle runs on the humid and blacked road surface with strong light absorption capability in the night of rainy days and adjust the lighting color temperature to the red yellow color temperature and maximize the vision distance without stunning when the reflection is strong in foggy and snowy days.