Abstract: ： The multi-statistical analysis software was used to analyze the chemical characteristics and formation causes of the groundwater in the reservoir area of Guangxi. Through correlation analysis, factor analysis and cluster analysis, it was found that the groundwater components were highly correlated and the dependence was high. The chemical types of water in factor 1, factor 2, and factor 3 were bicarbonate-chloride-calcium type water, sulfuric acid-magnesium potassium type water, and sulfuric acid-potassium sodium type water, which were basically consistent with the Shukalev classification. The karstification （dolomite, limestone, rock salt dissolution）, cation exchange adsorption and gypsum leaching of the study area had certain influence on the chemical characteristics of groundwater. The chemical characteristics of groundwater showed obvious spatial and temporal differences, and the dominant group of groundwater in different locations were different.

Key words: groundwater chemical characteristics, SPSS, correlation analysis, factor analysis, cluster analysis, Guangxi