Abstract: Coal Mine Hydrogeological Management Information System （CMHMIS）,which the writers have exploited,is used to study the hydrochemical character of the groundwater system of coal mine in this thesis.Based on introducing briefly the whole design and the function of all models of CMHMIS,synthetical study on the hydrochemical character of the groundwater system in Zhangshuanglou coal mine has been elaborated using CMHMIS,and an optimal analysis scheme,which fits in with the specific condition of the coal mine,has been concluded finally.