Abstract：Based on the metallogenic regularity of the Ashele copper ore deposit in combination with drilling, geochemical and geological data, the authors found that the northern part of No. I ore body (the major ore body) is in the concealment state and tends to extend northward accompanied by increasing depth. This discovery has provided a favorable test place for deep and edge prospecting work. This paper deals with the advantages of the IP and CSAMT methods in the exploration of deep sulfide polymetallic ore bodies and the practical working procedures. The combinational exploration composed of IP central gradient array amd CSAMT was carried out in the test area, and the result has fully verified the northward extension tendency of No. I ore body. The two-dimensional inversion profile can fairly well reflect U-shaped spatial distribution of No. I ore body.