Based on the analysis of core, logging, and seismic data, the sedimentation characteristics are studied based on the systems tracts stratigraphic framework of Triassic system in Akekule Area. Three sedimentary facies including braided river delta, lake, sublacustrine fan, and seven subfacies are recognized. There are seven kinds of sand bodies; they are distributary channel sands, chief subaqueous distributary channel sands, subordinate subaqueous distributary channel sands, mouth bar sands, feeder channel sands, braided channel sands, and distal sheet sands. The distributions of sand bodies in different periods are identified, and three models for the distribution of sand bodies, which are braided river delta of shallow gentle slope, braided river delta with slope break zone-sublacustrine fan, and normal braided river delta, are established. The paleogeomorphology plays an important role in the distribution of sand bodies.