Abstract: In this paper,based on the monitoring data of mineral water chemistry in Changbai Mountain Area,geostatistics and hydrochemical analysis method are used to study the chemical characteristics and causes of mineral water,and the evaluation index system of water quality health function is established. The results show that:the mineral water in the study area is mainly composed of single metasilicic type and CO₂ compound metasilicic type. The TDS,total alkalinity,total hardness and CO₂ content of the composite mineral spring are 1～2 orders of magnitude higher than that of the single type mineral spring. The metasilicic content has different spatial distribution characteristics compared with other components. Weathering of rocks is the main reason for the formation of metasilicic mineral water and the main reason for the formation of the composite mineral spring is that the deep hot water rises along the fracture and mixes with the shallow groundwater. Weak alkaline and low hardness metasilicic type mineral spring is widely distributed in the region. The content of each index meets the quality standard of mineral water and tastes good.