Abstract: To identify the characteristics of sedimentary facies and microfacies and their relationships with the paleogeographic setting,based on microfacies observation of outcrops, microfacies description of cores, characterization of imaging?logging facies, restoration of structural evolution and superimposed analysis of sedimentary elements, it is considered that Cretaceous Bashijiqike formation is generally controlled by 3 factors such as southern Tianshan mountain, Wensu swell and Kuruktag mountain in provenance. Bashijiqike formation provenance in the Kelasu thrust belt is mainly originated from southern Tianshan mountain, and that in the western part of Tabei uplift is from Wensu swell, and that in the mid?eastern part of Tabei uplift from Kuruktag mountain. Qiulitag structural belt is the intersection area of these 3 provenances and Wushi sag is controlled by both southern Taishan mountain and Wensu uplift; 2 typical sandstones such as braided delta?front mid?fine sandstone and fan?delta front underwater distributary?channel silt?fine sandstone are mainly developed in the Kelasu thrust belt. Sandbodies are superimposed and distributed continuously with the residual thickness of 150~260 m; Tabei uplift is dominated by mid?fine sandstones of fan?delta front underwater distributary?channel facies and fine?silt sandstones of braided delta?front underwater distributary?channel facies mixed with some silt?fine sanstones of river mouth bar facies. The thick sandbodies are generally distributed continuously in Tabei uplift with the residual thickness of 100~300 m. The understanding as“the sandstones are distributed in the whole depression”in Cretaceous Bashijiqike formation provides a significant theoretical basis for the breakthrough of the oil and gas strategy in Kuqa foreland area