In this paper,by using cluster analysis and principal component analysis(PCA) in modern statistics,eleven types of trace elements in the groundwater of old mining areas of Huainan coalfield were determined by SPSS15.0 for multivariate statistical analysis.Based on the cluster analysis,the migration rule of trace elements in Huainan aquifers is presented,and the characteristic elements of each aquifer are studied through selecting Co,Rb,Sc,V,Ba,As,Mo as the types of trace elements in groundwater and taking S...