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. Being controlled by the tectonic movement of the Indosinian crumpling orogenesis, the Yanshanian rift and the early Himalayan rift and so on, they experienced a complex burial and hydrocarbon generation. Although its depth has more than10 kilometers in the northern deep depression and may have a continuous hydrocarbon generation, its current depth are only 200~2000 meters in horsts and 2000~5000 meters in depressions and slopes. The hydrocarbon generation intensity in different structural position is related to erosion thickness and its burial history. Based on the thickness of well sites, the estimated largest eroded thickness is 2256 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. The recovered eroded thickness and burial—tectonic—thermal evolution analysis showed that the Permian source rocks in the northern and western depression began to generate hydrocarbon in Yanshanian stage. Source rocks in slopes and horsts do not mature in present.