Abstract:The South China Sea has a superior geographic location and a special tectonic environment. Its abundant and sufficient sediment sources, complex and diverse landforms and widely distributed continental slopes provide good conditions and ideal places for the development of turbidity currents. In the northern South China Sea, a large number of terrigenous sediments from the South China mainland and Taiwan Island are transported to the continental slope. Coupled with the suitable slope of the continental slope area, the turbidity current deposits are very developed.There are many submarine landslides of different scales and turbidity current deposits in the northern continental slope of the South China Sea. In the borehole records and seismic data of Yingqiong continental slope in the northern South China Sea, many stratigraphic reversals were found, most of which were caused by turbidity current deposition. Based on the geological, topographic and stratigraphic data, we used Sedsim software to simulate and analyze the turbidity current deposition in Yingqiong continental slope. The results show that the flow and sedimentary characteristics of turbidity current are different with the development of turbidity current. At the early stage of turbidity current, the overall velocity is slow, and some coarser sediments deposit a little in the middle and upper part of the continental slope. In the middle stage of turbidity current formation, the fluid accelerates continuously on the continental slope, and the deposition is not obvious. At the later stage of turbidity current deposition, the turbidity current is slowed down at the slope break, and the main body of sediments is deposited, and the remaining sediments are transported to the flat topography. The sedimentary topography is in the form of counter- current migration, and turbidity current deposition is basically distributed within the range of 10km. The thickness of turbidity current deposition will decrease with the increase of flow distance, and layered deposition will occur.