At Present, to satisfy the demand of passengers travelling convenience, China’s High Speed Railway has entered an unprecedented rapid development period. Under this background, research on operation cost-benefits of china high-speed railway is most important and meaningful. The article concludes the following three parts. The first part is to give the definition of research scope. The second part is to give analysis and evaluation on opening and operation cost-benefits. This part is to give a detailed evaluation indexes system and FAHP calculation model; furthermore, to give an example to illustrate the application of evaluation indexes system and FAHP calculation model. The final part is to give effective suggestions and measures to improve cost-benefits of CRH.