In　this　study,　we　used　groundwater　quality　data　from　17　sampling　sites　in　Chaoyang　District　of　Beijing,　which　was　measured　to　analysis　hydrochemical　characteristics　and　water　quality　evaluation　combined　with　Shukarev　classification,　single　factor　evaluation　method,　comprehensive　evaluation　method　and　fuzzy　comprehensive　evaluation　method　in　different　seasons　in　2018.　The　results　showed　that　there　was　little　difference　in　chemical　composition　and　groundwater　quality　in　different　seasons.　The　groundwater　ions　were　mainly　HCO3-,　Ca2+,　and　Mg2+　in　the　western　region,　and　the　salinity　of　water　was　low.　Na+　and　Cl-　appeared　in　the　southwestern　and　eastern　region,　and　the　concentration　of　Na+　in　May　was　lower　than　that　in　September.　Although　the　single　index　evaluation　method　was　one-sided,　it　could　determine　the　main　pollutants.　Although　the　comprehensive　evaluation　method　could　reflect　the　water　quality　status,　it　greatly　highlighted　the　pollution　factors　and　overestimated　the　degree　of　water　quality　exceeding　the　standard　to　some　extent.　The　fuzzy　comprehensive　evaluation　method　considered　the　weight　of　participating　factors,　which　made　the　evaluation　results　more　objective　and　reasonable.　The　four　parameters　of　TH,　Fe3+,　NH4+-N　and　As3+　exceeded　the　standard,　but　they　generally　met　the　drinking　water　quality　standard.　©　Published　under　licence　by　IOP　Publishing　Ltd.