Abstract: The basic principle of Multi-electrode Resistivity Method with conventional resistivity method is identical. Because of special mode the survey line laid, it is seldom used in tunnel geological prediction. The depth of the tunnel in K1+640~K1+820 of the Guiyang Aha Reservoir sewage tunnel is burial 20meters. The ground surface for agricultural is experimental field. The area of the tunnel site is karst with the development of groundwater, it just provide a good foundation for implementation of advanced geological prediction used the electrical method. Ground surface experiment and cave excavation verify that it is reliable to predict geological condition in tunnel with the electricity method.