In this article，the sequence stratigraphy of the Jurassic in the Taibei hollow of the TuhaBasin(i．e．The Turpan—Hami Basin)is studied on the basis of geological，well logging and seismicdata．The Jurassic iS divided into 3 sequences．And LST，TST and HST are developed in each se—quence．The sequence is subdivided into three types of parasequence sets and parasequences．Through an analysis of the evolutionary model of sedimentary system tracts，2 sets of source re—sevoir and cap rock association are determined．