Abstract: The nature and sedimentary evolution of Carboniferous—Permian prototype basins in Bogda area, southern margin of Junggar Basin have long been controversial.Based on the field measurement of Carboniferous and Permian continuously exposed in Jingjingzigou section in the northern margin of Boghdad Mountains, the lithology and sedimentary facies of the strata are systematically analyzed.Combined with the previous research results of tectonic evolution, igneous petrology and geochemistry, the Late Paleozoic sedimentary evolution and the transformation of prototype basin properties in this area are discussed, which has a very important guiding significance for the in-depth analysis of the Late Paleozoic sea-land conversion in Junggar Basin.Marine carbonate platform and deep-water turbidite fan developed in Late Carboniferous, with a small amount of pillow basalt.In the Early Permian, nearshore subaqueous fan and deep-water turbidite fan were developed under the background of residual sea deposition.The Middle Permian experienced the evolution process from marine facies to lacustrine facies.In the early stage, braided river deltas were developed in the shallow water environment of Urapa Formation and Jingjingzigou Formation, and in the Late stage, shale and carbonate rocks in the semi-deep lake-deep lake facies of Lucaogou Formation were characterized.In the late Permian, the study area developed brown-red and gray-green glutenite of thick fan delta facies.Comprehensive analysis shows that the Bogda area in Late Carboniferous is a rift basin with typical bimodal volcanic rocks and deep water turbidity currents.The Early-Middle Permian is a post-collision intracontinental rift, which developed an extensional slump deformation structure and bimodal volcanic rock assemblage.Late Permian into intracontinental depression basin, Bogda area generally developed alluvial fan or fan delta facies, sedimentary environment occurred obvious mutation.