Abstract: The water supply in Shuangliao City is mainly groundwater and the change of water quality will have a great impact on industry,agriculture and residents’ life.Therefore,it is of great significance to study the chemical characteristics and formation process of groundwater water in Shuangliao City. Based on PHREEQC software,this study carries out reverse geochemical simulation on the two paths of diving and micropressurized water,and analyzes the formation and evolution law of groundwater water chemistry in Shuangliao City in combination with the main ion ratio. Further,by combining geological and hydrogeological conditions,hydrogeochemical processes and the characteristics of groundwater chemical composition,a hydrogeochemical evolution model is established,qualitative and quantitative characteristics of hydrochemical evolution of groundwater in the study area are given,and the hydrogeochemical evolution process in the area is revealed. The results show that evaporation,solubility and cation exchange are the main control factors in the chemical formation of diving water in Shuangliao City,and soluble filtration and cation exchange are the main control factors in the process of micropressurized water flow.