The Chinese passenger car market has now returned to rationality. Car quality，intelligence technology and driving experience becoming more important to consumers. This paper studies the behavior of consumers buying cars from the aspects of purchasing new cars，replacing old cars and buying used cars. With research，data analysis and other methods，detailed analysis of Chinese brand consumer behavior preferences from price，vehicle type，brand，model，color and location factors and so on. Post-90s consumers pay more attention to the intelligence and personalization configuration of models. And the upgrade trend of replacement of used cars is obvious. There is a strong correlation between the amount of car purchases and the degree of regional economic development.