Transportation is the foundation of a strong country and the key to national prosperity. How to use investment and financing policies to stimulate the inherent potential of transportation infrastructure to promote high-quality economic development has become an urgent and key issue to be studied in the new development stage. In this report，based on the theory of public risk，this paper analyzes the transportation infrastructure investment and financing policy since the eighteenth big background，system carding and summarizes the main content of the transportation infrastructure investment and financing policy and its remarkable achievements，this paper analyzes the traffic infrastructure could face a funding gap of large，investment depression effect and polarization effect，transportation infrastructure investment and capital mismatch risks caused by labor migration direction，and put forward innovative transportation infrastructure financing model，expanding transport infrastructure investment as the main fulcrum effectively，and increase the transportation infrastructure in cutting-edge technologies and applications of technology innovation investment to strengthen hub city policy suggestions such as key material guarantee for the ability，in order to strengthen policy leverage，We will help build a modern comprehensive transport system to lead the building of China into a transport power in the new era and inject transport power into the building of a modern China.