Abstract: Carboniferous-Permian strata distribute widely in south area of Beishan,Xinjiang,which is a suit of slight alterative and strong deformation rock in the mass.The lithostratigraphic unit from old to youth by ascertainment over again as follow:Early Carboniferous Hongliuyuan Formation,Late Carboniferous Shibanshan Formation,Shengliquan Formation and Ganquan Formation,Early Permian Hongliuhe Formation,Middle Permian Luotuogou Formation.Their sedimentary environments go through from seashore facies to alternant sea-and-land facies.They are two quite integrated sedimen tary gyration.The color of the sediment is that the mauve in serts the grayish green and the source piece in the land is the quartz and feld spar for low maturity,which displayed the deposit characteristic of oxidation,anea rsourse and celerity,reflected the basin nature of the rift valley in the land.