Abstract: The treatment of the retired uranium mountain is a complex system engineering, retired-management environmental benefit analysis including natural environment, ecological environment benefit analysis. Due to the special environment of uranium mountain region, the contents and the standards of treatment are different with other mines, so the indexes have certain particularity. The article adopts analytic hierarchy process (AHP) to calculate the weight of each index, making the removal of the pollutants as benefits of retired-management and multipling the removal of pollutants by the corresponding weights as total benefit.The article takes some uranium mountain for a example,and gives the conclusion that the total environmental benefit is good after retired-management.