Abstract：Water shortage in southwest China constitutes a serious threat to local people's living water, and restrictes the economic development of this region. Therefore, the reasonable choice of integrated geophysical methods and technologies for finding underground water and improving the efficiency of groundwater exploration on the basis of the hydrogeological characteristics of southwest China constitutes a very important problem faced by hydrogeologists. This paper describes the basic principles, technical characteristics and application of the electrical conductivity imaging system and high density resistivity method, exemplified by application practice of groundwater exploration in karst mountain areas. The comparative analysis, the delineation of water areas in the karst zone, the determination of well locations all show that the method is effective. This paper presents suggestions for groundwater exploration in Southwest China and utilization of groundwater resources in future.