The lighting collimating lens is designed for the use of headlight of automobile, in which LED is used as lighting source. Firstly, the simplified illumination structure model is built, which is designed based on the theory of non-imaging optics and the parameters of traditional lenses. The structure is optimized by optical simulation software Zemax. Secondly, the three-dimensional (3D) model of lens is set up by SolidWorks software and simulated by TracePro. The results show that the optimized lens′ light-use efficiency is improved by about 6%. Thirdly, the optimized lens is made and prepared for test. Finally, the experimental system is set up, by which the optical characteristics of the traditional and optimized lenses are investigated. The results show that the maximum light intensity is improved by about 128% at 5 m away and the irradiated area at the same illumination (50 lx) is enlarged by about 25%.