The Tongjiang-Nanjiang-Bazhongarea is an important exploration area of SINOPEC, with the main aim formations being the Permian Changxing Formationand the Triassic Feixianguan Formation. Because related geological data are limited, sedimentary modeland spatial distributions of these two formationsare rarely studied. It is known that sedimentary facies analysis is groundwork in the target selectionof oil-gas exploration. Various work indicated that the area was developed with open platform facies, rampfacies and basin facies. However, the rampfacies is notstudied in detail, and the reef-bank ontheedge oftheplatform is not confirmed. The papermakesuse of outcrop and seismicdata to establish a sedimentary modelof the Changxing-Feixianguan formationsin the Tongjiang-Nanjiang-Bazhongarea. As a result,a reef-bank on the edge of platform faciesis confirmedin the area,which requires special attention from the oil-gas exploration department.