Abstract: This paper builds a performance evaluation index system of ecological construction project which combines the process of ecological construction and ecological effect from the public value angel and quantitatively measures the performance of implemented ecological projects: Returning farmland to forest and water conservation project of capital have good effects with public value performance evaluation scores of 0.9013 and 0.8754; Small watershed management project has better effect with a performance evaluation score of 0.7161 and comprehensive grazing prohibition project has the poorest effect with a performance evaluation score of 0.1538. We can see from the internal structure of the performances of four ecological construction projects that the process performances are less than the terminal ones and the process performance is just 12.90% of the terminal performance respectively in comprehensive grazing prohibition project. The notable difference in process and terminal performances reveals the general problem that current ecological project focuses on the ecological effects and ignores the process of policy implementation. The public value performance evaluation of ecological construction project will provide a new way for the evaluation on construction projects and a new case for the performance management of the government.