The Triassic in Halahatang Hade area of the Tarim Basin, as one of the favorable horizons for oil and gas enrichment, has only been studied at the basin level. However, the understanding of the regional zone is unclear, the sedimentary evolution within the sequence is unclear, and the exploration guidance for the block is not targeted, so the regionalization research is urgently needed. Based on the high-resolution 3D seismic data, core and logging data covering the whole area, the Seismic attribute structure was analyzed by using seismic Sedimentology research methods, and the sedimentary facies types and Phase plane distribution range of the Karamay Formation in Halahatang Hade area with an area of 18 000 km² were identified, so as to more accurately describe the sedimentary facies evolution characteristics. To provide a basis for predicting the distribution of lithological oil and gas reservoirs in combination with regional tectonic background and fault distribution in the future. The analysis shows that the Triassic Karamay Formation in Halahatang Hade area of the Tarim Basin is a lake delta sedimentary system, with obvious differences between the upper and lower members. The sand body in the lower section gradually decreases from northeast to southwest, reflecting a decrease in the influence of river channels. The delta plain subfacies are developed at the slope of the Yaha ancient uplift, and the delta front subfacies and lake facies are successively developed towards southwest. The lake basin in the upper section of the Karamay Formation contracted, and the delta plain subfacies were widely developed, which transited to the delta front subfacies and lake facies from southwest to west. Among them, Incised valleys sedimentary system is developed in delta plain subfacies.