Abstract: For its high and steep terrain, complex geology, sensitive environments and construction difficulties, K227 landslide of Shuangyong highway became a typical complex cutting ultrahigh slope and the focus of concern during constructing and maintaining. Based on practice, thinking, evaluation and monitoring in the long-term governance process of participation, through the analysis of terrain conditions, geological conditions, environmental conditions, stress adjustment and deformation control, the safety evaluation indexes system of the slope was built. The weight of each index was calculated by analytic hierarchy process. With fuzzy comprehensive evaluation method, expert authority factor correction and maximum subordination degree principle, the comprehensive model for slope safety evaluation was established. Meanwhile, the calculation of limit equilibrium method and finite element analysis, and monitoring records in site had confirmed the safety evaluation result. Therefore, it was proved to be an effective method for evaluating treatment effect of complex cutting high slope disease.