The Triassic of Hami depression is an important source rock and reservoir stratum. It is divided into one second-class sequence and four third-class sequences. Each third-class sequence is consisted of two or three system tracts, including lowstand system tract, highstand system tract, transgressive system tract. The Triassic of Hami depression is mainly developed as braided river, meandering river, braided river delta, meandering river delta and lacustrine facies. Among these, the meandering river delta and braided river delta are main reservoir facies belt, the lacustrine facies is favorable source rock and cap rock facies belt. From early to middle Triassic epoch, south central gentle slope of Hami depression is extensively developed as braided river facies, north and the north-west of Hami depression is developed as meandering river facies. In late Triassic Huangshanjie group and Haojiagou group period, the braided river deltas are developed, in late Karamay group, the meandering river delta is developed, which is the favorable belt for locating lithologic reservoirs.