The utility model relates to an automobile headlight, comprising a lampshade (a matched mirror), a lamp holder, a bulb, a reflector, a light regulating mechanism. The rearward of a high beam reflector in the automobile headlight presents a free-form surface and an axial section in the vertical direction of the free-form surface assumes a parabola, the foreside of the high beam reflector being enclosed by a plane and a cylinder surface and the ratio between the distance between the axises of the plane and the cylinder surface and the diameter of the cylinder surface being between 1 to 2.5 and 1 to 4. Through the ameliorated structure of the high beam reflector, the light can be distributed more easily for the high beam in the automobile headlight and the light shape can be controlled more easily. The utility model meets the needs of the light intension standard with a strengthened light intension.