Research on the natural rock combination and petrochemistry of different sections in Bogda—Harlik mountain, results show that the rock combination is basalt, basaltic andesite andesite and dacite and rhyolite composition, different from the continental rift environment or extended alkalin bimodal volcanic rocks. Geochemical characteristics show that the study area volcano rock mostly belong to calc alkaline series, enriched in Al high Ti, and HFSE depletion, performance for the volcano arc environment. And consider that the evolution of the carboniferous volcano activity may be associated with the Kanggurtag basin.