With the elimination of used car migration restrictions，Value Added Tax（VAT）reform，and the export of used cars，China used car market maintains a growing trend. In the first half of 2019，China used passenger cars trading volume reached 6.33 million，a year-on-year increase of 10.7%. In this context，all business entities actively carry out business strategy innovation and technological innovation，bringing new opportunities and challenges to the market. Based on the overview of 2019 China used car industry，this paper deeply analyzes and interprets the policy，market performance and business strategy，focus on the bottleneck of the industry-residual value assessment to provide new directions，new ideas and new plans for China used car market development. The purpose is to activate used car market and drive new car sales growth，which will bring a blue ocean shift for vehicle market.