In order to assess more precisely the effects of hydraulic fracturing and wastewater reinjection on groundwater during the shale gas exploitation, the model with different evaluating index is required to evaluate the groundwater vulnerability. Based on the DRASTIC model, the assessment model of groundwater vulnerability in mining area, DIRTEV, and groundwater vulnerability assessment model in reinjection well area, DIRWOCT, were established, respectively, by analyzing the potential transport pathways of pollutants during shale gas exploitation. The evaluation factors in the model were graded and graded according to the relevant information. The weight of each factor is determined by fuzzy comprehensive matrix method, and the sensitivity analysis of the evaluation results is carried out by using the single parameter method. The evaluation results of a shale gas mining area in Sichuan show that the established models can be applied to the groundwater vulnerability evaluation in shale gas exploitation areas.