The dark-gray shale of Permian Gufeng Formation and black shale and coal of Permian Longtan Formation in the Huangqiao area, Taixing City, northern Jiangsu, compose an important marine and marine-continental transitional hydrocarbon layer system. Based on the thickness of well sites, the estimated largest eroded thickness is 2 256 meters in Indosinian movement, and the methods of shale interval transit time and seismic erosion interpretation have showed that its largest erosion thickness is 900 meters in Yanshanian movement and 550 meters in Himalayan movement. The main eroded area is located in the eastern, southern and western horsts, and the newly eroded thickness was larger eastward and westward.