Abstract: In order to scientifically and quantitatively evaluate the comprehensive benefits of land treatment eco engineering for wastewater,the index system and index weight of evaluation and the calculating methods for comprehensive benefits were provided through the analysis of horizon profile (AHP).Then,the AHPwas used to analyze and evaluate the comprehensive benefits of a forest type slow filtration land treatment system engineering in Huolinhe Region. The results indicated that the value of comprehensive benefits for this system was 0.64,which economically belongs to a middle grade ecosystem with a good benefit on both environmental and society.

Key words: Wastewater, Land treatment eco-engineering, Comprehensive benefits, Huolinhe River