The development of automobile LED lamp has undergone many changes, from the original halogen lamp to the later Xenon lamp, to the present LED lamp. The advantage of halogen lamp is low cost, the disadvantage is short life, weak brightness, large light decay, it takes half a year to obviously dim, and then it is not bright. The advantages of Xenon lamp are high brightness, long range, long life, disadvantage is high temperature, long time lighting, lamp cover will be baked blurring, installation of the stabilizer to place the back cover outside, need to punch holes in the back cover, the original car has a certain damage. Now the LED lamp integrates all the advantages of halogen lamp and Xenon lamp, and improves the disadvantages one by one. With high brightness, long range, no glare, low temperature, small light decay, long life, non-destructive installation, because of its short volume, the driving block can be installed in the assembly together with the lamp body, covered with the rear cover, so it has been popular by the majority of users. In the future, automotive LED lights will be suitable for more scenes because of their excellent performance.