Regarding the problem of corrosion protection of transportation infrastructure such as wharfs and bridges，a large amount of data is collected and sorted，and the basic situation and cost investment of corrosion protection of domestic and foreign wharfs，highways and bridges and other transportation infrastructures are analyzed and explained.The research results show that the corrosion cost of transportation infrastructure is huge，through the adoption of advanced corrosion protection technology and improvement of the awareness of active corrosion protection，the corrosion cost can be significantly reduced. The research results have positive significance for the macro analysis，overall planning，project scheme design and implementation of corrosion protection of transportation infrastructure.