Abstract: Taking the Dajing Ag-Cu polymetallic deposit in Inner Mongolia as the research object, using the integrated exploration of gravity, magnetic and controlled source audio-frequency magnetotelluric method, the unknown mineralization anomaly is delineated from the characteristics of known ore-induced anomalies, and combined with the geological, geochemical and drilling results, the obtained gravity, magnetic and electrical data are comprehensively interpreted and studied, which qualitatively explains and infers the favorable metallogenic space in this area, avoids the one-sidedness and blindness of a single method, provides a basis for drilling, and achieves the ultimate purpose.