Abstract: Formation of hydrochemistry components in discharge areas in Jinan was researched.Inert chemical tracers such as Cl-and NO-3 were used to be analyzed atmospheric input from recharge areas.The result showed that groundwater in Xijiao and Ping’andian recharge areas was not polluted clearly.Groundwater in urban was polluted distinctly by local shallow groundwater and surface soil.Then,water-rock interaction along the horizontal flow pathway was quantificationally analyzed through hydrochemical data from Xijiao.Compared to tracer result,consistent result appeared that groundwater in urban was polluted obviously.Meanwhile,trendline of Dedolomitization process was put forward during groundwater movement.