Automobile form design or car styling is a complicated process with multi-discipline knowledge.The concept of form feature and form feature line in terms of describing the automobile form was introduced based on the 100 digital models of automobile.20 form feature lines was captured from the 100 digital models,and sorted into three classes: the main feature line,the transition feature line,and the subjoin feature line.An automobile form description model was proposed based on the feature and the feature line.