A typical sodic soil area in the west of Jilin province was selected for test region.Primary hydrochemical indexes of groundwater were determined.Relationships between electrical conductivity and salt content,mineralization of water,ions content were analyzed.Alkalization characteristics of groundwater were described based on its ionic compositions.Selected electrical conductivity, sodium adsorption ratio(SAR) and mineralization of groundwater for evaluating indicators,groundwater qualities were evaluated at the end.