When all kinds of garbage are buried in the ground, the landfill leachate will gradually infiltrate into the soil from the aeration zone, causing a certain impact on the soil environment. In view of the significant physical property difference between the upper landfill layer and lower undisturbed soil layer, the high-density electrical method is of limited precision, and the drilling survey is time-consuming, labor-consuming and costly, so complementing the advantages and disadvantages of the two methods has practical application significance for comprehensively identifying the spatial distribution characteristics of landfill layer. In this study, a landfill was explored by the combination of high-density electrical method and drilling method, and the stratum structure of the site and the spatial distribution of the landfill layer were found out, and the three-dimensional stratum solid model was constructed, and the spatial distribution of the landfill layer was determined with the Volxer software drawing the rendering results of high-density electrical inversion and constructing the 3D solid visualization model of landfill by GMS software, and analyzing the application results of the two methods, which provided a theoretical basis for landfill pollution control and risk control.