In order to clarify the sequence stratigraphy and sedimentary facies distribution of Donghe Sandstone Member-Breccia Member of Bachu Formation in the eastern Lunnan ancient buried hill-Caohu Sag of Tabei Uplift, Tarim Basin, the sequence stratigraphy and sedimentary environment in the study area were studied based on drilling, logging and seismic data by applying the principles of sedimentology, sequence stratigraphy and seismic sedimentology. The results show that the Donghe Sandstone Member can be divided into three parasequences, the Breccia Member can be divided into one parasequence, and these four parasequences are named DH-1, DH-2, DH-3 and DH-4 from bottom to top. These four parasequences all developed in marine transgressive sedimentary environment. A fan-delta-shore sedimentary system are mainly developed during the deposition period of Donghe Sandstone Member-Breccia Member in the study area, in which the first and fourth parasequences are dominated by fan-delta deposits, and the second and third parasequences are dominated by marine shore sandstone deposits. The above understanding has an important reference role for the exploration of structural-lithologic oil and gas traps in the eastern Lunnan ancient buried hill-Caohu Sag of the Tabei Uplift.