Abstract: In this paper,the current research status of intelligent evaluation of open pit slope stability is summarized from the aspects of intelligent sensing means,intelligent evaluation and prediction methods,and intelligent decision- making technology,etc. ,the characteristics of open pit slope engineering are analyzed,and the existing problems in the current research of intelligent evaluation of open pit slope stability are presented. The academic idea of the three-in- one slope stability intelligent evaluation,including displacement time series threshold,mechanical mechanism analysis, case analysis and expert system diagnosis,is the development trend of open-pit mine slope stability intelligent evalua- tion research. Firstly,a slope disaster case library and multi-factor multi-modal intelligent recognition mathematical model are established,the deep learning and big data analysis methods to cluster case types are used,and the features as well as pattern matching are identified. Secondly,via the mechanical mechanism calculation and evaluation,the in- gesting hidden danger stoic triggers and conditions are identified. Thirdly,a monitoring warning index system and warn- ing threshold based on the case pattern matching results are established,the case library knowledge base and expert system are constructed,and intelligent decision-making is realized. Finally,taking the northwest slope landslide of Da- gushan Iron Mine as an example,the change rule of slope safety factor is given based on mechanical calculation. At the same time,combined with the matching result of landslide case database,the index threshold (displacement accumula- tion and displacement rate) of site data time series curve is determined,so as to scientifically and reasonably give the judgment result of early warning situation. Data analysis,site model visualization,early warning release and landslide diagnosis are realized through cloud platform. The case preliminarily verifies the academic thinking of the three-in-one slope stability intelligent evaluation,and provides an effective mean to realize the intelligent evaluation of open pit slope stability.