City life trash bums down the power plant selected location is a complex systems engineering. The policy-making factor are many, can obtain a more satisfactory result to its research with the aid of the specific analysis method. Utilizes the analytic hierarchy process to city life trash bums down the power plant selected location link, carries on the multi-objectives decision analysis specifically in view of the candidate factory site which comprehensively does, calculates various factory sites and the corresponding synthesis compatibility appraisal value, performs the comparison, by obtaining the best selected location. From the environmental factor, the economic agent, the social factor and other factor four aspects are analyzed, with the weight and the quantitative way to conduct the research, w-making fac into the priori compared with various politot important degree, obtains trash to bum down the power plant selected location to be supposed to change ty target by the garbage disposal resources to carry on the choice the conclusion.