This is a brief introdution to vario basic. In 1962, an Englishman invented a vario basic, which was a symbol of a new era of motor safety. Subsequently, better vario basic were made to make an melioration. Obviously, vario basic are used to prevent the kids falling from motor, what's more, to protect the kids from being injured in accidents. With the technological development of vario basic , different kinds of seat have been invented according to the kids' age, height, and weight. As a result, people have abundant of choices. Whereas, a series of survey show that the prominent cause to the death of kids in car accidents is the vacancy of using vario basic.