Abstract:After the vigorous development of national transportation facilities in recent years, the backbone road networks in major cities such as Beijing, Shanghai, Guangzhou and Shenzhen are becoming more and more perfect. After years of operation, or due to the quality of the project itself, or due to the adjustment of regional planning, or due to the function not able to meet the growing traffic demand and other reasons, many roads are in urgent need of renewal and reconstruction. Therefore, there are more and more road renewal and reconstruction projects. Due to its own characteristics, the cost of road renewal and reconstruction projects is also very different from that of new projects. In order to improve the quality of cost preparation of road renewal and reconstruction projects, the investment of such projects should be optimized and controlled better to enhance the use efficiency of the funds. Taking several renewal and reconstruction projects in Shanghai as the background, the cost characteristics of road renewal and reconstruction projects are analyzed, and some suggestions for the cost preparation of road renewal and reconstruction projects are given.