According to China Association of Automobile Manufactures statistics, China’s automobile production and sales ranked first in the world in 2009. Although China has become a big country of automobile manufacture, the research and design capabilities of automobile is still weak, especially in styling design. How to use computer aided technology to promote the development of car styling design is the aim of this article. CAS (computer aided styling) may be is a good choice. First, comparing the different among traditional styling design process, CAD design process and CAS design process, this article points out the benefits brought by CAS; Second, this article explain the details of CAS design in car styling design; Finally, this article analysis the character of CAS which is important to apply CAS correctly. If Chinese auto companies could apply CAS well in car styling design, the industry of China automobile will enter a new phase.