Groundwater vulnerability assessment is part of geological environment assessment. At present, there are many studies at home and abroad, and a variety of evaluation models are proposed, among which the DRASTIC method model is the most widely used. AHP (Analytic Hierarchy Process) is a hierarchical weighted decision analysis method. Combining expert experience with theoretical data, it can achieve an effective combination of qualitative and quantitative, and more realistic and objective reflection of the evaluation results of the study area. In this paper, the Laizhou area is used as the research area. Based on the geological conditions, hydrogeological conditions, topography and meteorology of the comprehensive investigation area, the DRASTIC method model currently used is improved by the AHP method. The weights of the seven parameters in the original model were re- valued, and then a groundwater vulnerability model conforming to the study area was established, and the evaluation was divided. Finally, the groundwater vulnerability map was drawn.