Aquaculture and reclamation of lakes, large-scale infrastructure construction, and other human activities have resulted in decline wetland ecosystem sharply. Wetland protection becomes more and more urgent.Ecological compensation is an effective way to protect wetlands. The evaluation of compensation value could provide scientific basis for making the decisions of environmental management and wetland conservation. In this paper, based on the human capital and ecological environment loss, opportunity cost and inquiry method,the Mengxi railway project through Changhu Wetland Nature Reserve was c...