该文针对地下工程围岩稳定性分类界限存在的模糊性 ,应用模糊数学理论建立多级模糊分级聚类法。介绍了多级模糊分级聚类在地下工程围岩稳定性分类中的计算方法及步骤 ,并与其它方法计算结果进行对比 ,说明该方法的应用效果较好 ,是一种简单快速的好方法 Aiming at the fuzziness of classification boundary of surrounding rock stability in underground engineering, this paper establishes a multi-level fuzzy hierarchical clustering method using fuzzy mathematics theory. This paper introduces the calculation methods and steps of multi-level fuzzy hierarchical clustering in the stability classification of underground engineering surrounding rock. Compared with other methods, it shows that this method has a good application effect and is a simple and quick method