In order to enhance the dam-passing transportation capacity of the Xiangjiaba hub of the Jinsha River and alleviate the transportation congestion of downstream goods in the reservoir area，this paper tends to build a dam-overturning transportation system for the Sichuan bank of Xiangjiaba and proposes three transportation channel schemes. In order to select an economic and reasonable construction scheme，the paper analyzes and estimates the operation cost and operating income of each scheme item by item according to the survey data of built dam-overturning transportation systems in Xiangjiaba and Xiluodu and the forecasted dam-passing traffic volume of Xiangjiaba. In addition，the paper conducts an economic comparison among the three mutually exclusive schemes from the perspective of the whole life cycle through the minimum cost method and minimum price method and puts forward suggestions for optimizing the schemes in terms of obtaining subsidy funds and adopting phased construction.The results show that the present cost，annual cost，and transportation lump sum of reconstructing old roads with high-speed lines and constructing belt conveyors with low-speed lines are the lowest，and the scheme is recommended from an economic perspective. The optimized scheme further improves the economy and enhances the competitiveness and anti-risk ability of the project.