Based on the research and strata comparison above, the time-space evolution of lithofacies paleogeography of Triassic in Tabei-Tazhong Area of TarimBasin is analyzed. The result indicates that the evolution and distribution of aleogeographic framework reveal the succession and otherness in different periods through the multi-cycle transgression and regression for the depositional environment of Triassic. There are the good hydrocarbon generation conditions in Awati-Manjiaer Sag in Middle-Late Triassic.