The Late Cenozoic extensional structures, mainly a series of Late Cenozoic normal faults, have been discovered after careful seismic interpretation in the southwestern depression, Tarim Basin. The normal faults distribute in the northeastern part of the southwestern depression. They trend in NE-SW direction, and combine into graben-horst structures in profile. On some seismic profiles, the combination of the normal faults exhibit the feature of “negative flower” structure. The normal faults develop mainly in the Cenozoic strata. They cut upward to the lower part of the Pleistocene. The normal faults with opposite dip-directions meet each other in the Neogene strata, and then the fault displacement disappeared, and the downward extension of the faults cannot be identified directly on the seismic profile. According to the variation of the fault displacement and the fault growth indexes, the normal faulting begun since Late Pliocene, lasted to Early Pleistocene and then died out, i.e., ca. 3～2 Ma. The same faulting time as the Late Cenozoic normal faults revealed in the Tangguzibasi depression and on the boundaries of Bachu rise and Awati sag. They were formed under a slight regional extensional tectonic background, and represent a tectonic pause between two successive thrust pulses under the far-field effect of the India-Asia collision.