地下水化学特征合理的分类有利于更好地认识区域水文地质条件。本文通过采用spss聚类分析软件对观音峡背斜区地下水水化学特征进行分类研究。当并类距离取2时,将研究区所取水样分为5类,研究区地下水化学特征主要表现:岩溶水化学类型主要为HCO3·SO4-Ca或SO4·HCO3-Ca型水,碎屑岩裂隙水化学类型则主要为HCO3·SO4-Ca·Mg型水。 The reasonable classification of groundwater chemical features helps to better understand the regional hydrogeological conditions. In this paper, by using spss clustering analysis software on the Guanyinxia anticlinal zone groundwater chemical characteristics of the classification. The water samples collected in the study area were divided into five categories when the distance of the same type was taken as 2, the chemical characteristics of groundwater in the study area mainly showed that the chemical types of karst water were mainly HCO3 · SO4-Ca or SO4 · HCO3-Ca, Rock fissure water chemistry is mainly HCO3 · SO4-Ca · Mg type water.