Abstract: High-density electrical method plays an important role in karst exploration, and can effectively detect the location, shape, scale and filling of karst development zone. In this paper, several typical karst geoelectric models are established, and their high-density electrical response is calculated and analyzed. Combined with engineering examples, it is considered that the method of combining the pseudo-section of measured data with the quantitative inversion profile can improve the method to identify the abnormal bodies.