High power multi-channel array rolling tri-electrode sounding is a new geophysical exploration technique developed from the traditional electric sounding method and is characterized by deeper detection, high lateral resolution, large volume information supply (contemporaneous supply of resistivity and chargeability) and strong anti-noise thus widely applied to poly-metallic ore deposit exploration, hidden geo-disaster investigation and engineering geology etc. This paper introduces the assemblage and working process and application cases to hidden geo-disaster investigation.