The present study mainly selects the paraboloid to be a new of design the headlight reflector. Using Monte-Carlo method to design a low beam headlight and high beam headlight which consistent to the ECE regulations.Using the characteristics of paraboloidal reflector, I put the luminous surface right side up to. Reduce the unwanted stray light of the headlight, and moreover , to reduce the influence of glare for a coming driver causing by the headlight. Also, What we design is a kind of high photosource utilization (almost as high as 77%), the low-power consumption headlight lighting system ,and since just using the top half of the parabolic reflector, the volume of the car is more conducive to the car itself and the streamline car-shaped design.