Ecological protection is a common method used for protecting expressway slopes.There was no unified and well-recognized standard to evaluate the protective effects of ecological slope engineering.Based on the domestic and international findings of the related studies,an attempt had been made to establish evaluating indicators accounting the quality of soil-vegetation system and the landscape functions with a view of systematical engineering.Further,the two types of indicators were divided into sub-indices for practical considerations.The appraisal stand-ard incorporated with the indicator system categorized engineering projects into four grades,i.e.,excellent,good,moderate,and poor,which reflect rationally the nature and characteristics of the structure and functions of the soil-vegetation system.The index system were used to evaluate the performance of isolated slope sections in a single ecological slope protection project of the Chifeng-Tongliao highway by combi-ning analytical hierarchy process(AHP)with the fuzzy comprehensive evaluation.The appraisal results coincided well with field observations, implying that the indicator system could be used to objectively evaluate performance and sustainability of the soil-vegetation system.