应用模糊可能性理论，建立了矿业投资风险的模糊可能性评价模型和风险因素敏感度计算模型，提出了用风险变量的临界值划分风险程度的风险等级和投资风险程度模糊可能性的表示方法，并对某露天煤矿建设项目进行了投资风险评价实例研究．评价结果符合项目的实际情况，该方法具有实际应用价值． By using the fuzzy possibility theory, this paper establishes a fuzzy probability evaluation model and risk factor sensitivity calculation model of mining investment risk, puts forward a method of expressing the risk level of risk degree and the fuzzy possibility of investment risk level by using the critical value of risk variable, And an opencast mine construction project conducted an investment risk assessment case study. Evaluation results in line with the actual situation of the project, the method has practical value.