Abstract: In order to improve the reliability of open-pit slope safety early warning, this paper puts forward the group evaluation on risk degree of slope in open pit with the unknown weight and attribute weight of the decision-maker and the attribute value as the intuitionistic fuzzy number, and proposes intuitionistic fuzzy entropy weight method to determine weights,aggregates the evaluation matrices at all levels with the help of intuitionistic fuzzy weighted averaging operator, obtains the intuitionistic fuzzy number corresponding to each observation point , and makes decision analysis by taken it into the scoring function containing two parameters to. Finally, the actual data of the open-pit mine of ShenHua Baorixile Energy Co Ltd is reported as an engineering example in this paper which evaluates risk degree of the slope area by the model method.The study shows that the combination of entropy weight method and intuitionistic fuzzy theory not only reduces the interference of human factors in the risk assessment, but also establishes an effective connection between the impact factor and the evaluation result. The model can be used to guide the stability analysis and mining design of the slope in the open pit.