Depth　to　water,　net　recharge,　aquifer　media,　soil　media,　topography,　impact　of　the　vadose　zone　media,　and　hydraulic　conductivity　of　the　aquifer　(DRASTIC)　model　based　on　a　geographic　information　system　(GIS)　is　the　most　widely　adopted　model　for　the　evaluation　of　groundwater　vulnerability.　However,　the　model　had　its　own　disadvantages　in　various　aspects.　In　this　work,　several　methods　and　the　technologies　have　been　introduced　to　improve　on　the　traditional　model.　The　type　of　the　aquifer　was　replaced　by　the　thickness　of　the　aquifer,　and　the　index　of　topography　was　removed.　The　indexes　of　the　exploitation　of　the　groundwater　and　the　type　of　land　use　that　reflected　the　special　vulnerability　were　added　to　the　system.　Furthermore,　considering　the　wideness　of　the　study　area,　the　fixed　weights　in　the　DRASTIC　model　were　not　suitable.　An　analytic　hierarchy　process　(AHP)　method　and　an　entropy　weight　(Ew)　method　were　introduced　to　calculate　the　weights　of　parameters.　Then,　the　Spearman　Rho　correlation　coefficients　between　IVI　and　the　Nemerow　synthetical　pollution　index　(NI)　of　the　groundwater　quality　were　significantly　improved,　after　the　four　steps　of　modification.　The　level　differences　with　little　gaps　between　Nemerow　comprehensive　pollution　indexes　and　groundwater　vulnerability　occupied　the　proportion　of　the　area　from　75.68　to　84.04%,　and　finally,　a　single-parameter　sensitivity　analysis　for　the　two　models　was　used　to　compute　the　effective　weights　of　these　parameters.　By　comparison,　the　DRMSICEL　model　seems　to　perform　better　than　the　DRASTIC　model　in　the　study　area.　And　the　results　show　discrepancies　between　the　vulnerability　indices　and　groundwater　quality　as　indicated　by　existence　of　vulnerable　areas　with　bad　water　quality　and　vice　versa.