In previous exploration, researchers commonly considered that the primary halo method is an effective geochemical means for studying the distribution, geochemistry and denudation of the anomaly, and this method can also help predict concealed orebodies and assess mineral resource potential in the depth. Based on previous exploration of the Zhaxikang lead-zinc polymetallic deposit in Tibet, the authors studied vertical zoning of the deposit, and the results achieved can provide reliable geochemical information in such aspects as factors affecting mineralization, metal source, wall rock alteration, metallogenic stages and ore genesis. Primary halo study was carried out by analyzing Cu, Pb, Zn, W, Mo, Sb, Bi, Ga, Sn, In, Au, Ag and some other metallogenic elements in rock samples from four selected drill holes of ZK006, ZK007, ZK009 and ZK010 along No. 0 exploration line in the mining area. It is shown that the element anomalies and primary halos mainly occur below the altitude of 4 400 m, metal sources might have been derived from both strata and concealed rock mass in the depth, and mineralization might have experienced multiple-stage superposition. The authors hold that the economic orebodies of the Zhaxikang deposit might have a good prospect of downward extension in the depth.