Abstract:Due to the complexity of slope project,the comprehensive assessment is necessary to the slope safety and stability. In the comprehensive assessment,the establishment of assessment system and the determination of weight are both very important and difficult. In order to consider the field situation of slope,the comprehensive assessment is established based on the long-time monitoring data. Aiming at the difficulty of defining weight value,the catastrophe theory is used in the comprehensive assessment,and the specialty of catastrophe theory in the multi-rule assessment is utilized to avoid the subjectivity of artificial weight. The concrete steps of practice is to analyze the multi-layer assessment object first. After standard quantizing of bottom assessment index,the ultimate catastrophe function is obtained through quantitative computing by the normalization formula of different catastrophe models,and thus the comprehensive assessment of slope safety is realized. The engineering example indicates that the new assessment method is reasonable and feasible,and it provides a new idea for slope assessment.