From Cretaceous to Tertiary, the Tarim basin developed many types of sedimentary facies. There are marine, non-marine and transitional facies distributed over this area. The Upper Cretaceous-Paleogene marine deposits are scattered mainly over the foothills of West Kunlun to Southwest Tianshan Mountains in the southwestern depression of Tarim basin, but do not occur in the northeastern depression of Tarim basin. The Lower Cretaceous-Miocene strata mainly have non-marine deposits. According to an integrated analysis of the features of sedimentation, rocks and minerals, organism and geochemistry, the Cretaceous-Tertiary deposits in Tarim basin can be divided into 3 sedimentary facies groups, 12 sedimentary facies, 20 sedimentary subfacies and a certain number of sedimentary microfacies, and the Late Cretaceous marine deposits have been found for the first time in the northern Tarim basin. From Cretaceous to Tertiary there were developed two kinds of reservoirs in Tarim basin?clastic reservoirs and carbonate reservoirs. The reservoirs in the northwestern depression of Tarim basin are mainly clastic rocks. The Lower Cretaceous Yageliemu Formation of Kapushaliang Group, in particular, is a significant reservoir in Shaya uplift, and the Upper Cretaceous Bashijiqik Formation is an important reservoir in Kuqa foreland basin. The reservoirs in the southwestern depression include clastic reservoirs and carbonate reservoirs. The sandstone and conglomerate of the upper Lower Cretaceous Wulukeqiate Formation, the bioherm limestone of the Upper Cretaceous Yigezia Formation in the front of the foothills of west Kunlun can also form fairly good reservoirs.