Abstract:On the basis of research on the general slope stability evaluation methods,the disadvantages of the commonly used methods are analyzed and a comprehensive model for slope stability evaluation is established. By establishing slope stability evaluation index system,combining analytical hierarchy process with fuzzy mathematics theory,and making use of AHP to obtain the weight of every index,the fuzzy mathematics method is used to make a comprehensive evaluation of slope stability. Meanwhile,the model is used to analyze the stability of high slope of Geheyan hydropower station. The result indicates that the model makes slope stability evaluation more comprehensive,more scientific and more coincident than practical situation. It provides scientific basis for project decision-making.