Abstract:Characteristics of primary superimposed halo of No.100 line section in No.2 ore body in Hukousaile copper deposit in Alashan of Inner Mongolia have been studied. It is showed that elevation axial zoning sequences (from top to bottom) in the level of +1308 ~ 1141m in No. 100 orebody line section are WNiAsPbMoCuCoAuZn. It has an obvious mutually superposed characteristics. Geochemical parameters decrease gradually in the middle part. It can be determined that ore bodies are formed by multiple superimposed stages of mineralization. Ore bodies of two main metallogenic stages are partially superimposed. Its upper part of orebodies have been denudatied heavily, but there is still a certain extension. Study on primary halo overprinting can provide the basis for drilling in next step. It has clearly determined the study direction of primary halo in this area.