Abstract: The area of marine deposit in South China is about 50% of that in China.The marine sedimentary basins were incomplete.They have been reformed by structural movements taking place in the area.The distribution and structural styles of residual basins were greatly complex and inhomogeneous.The organic matter was overmature,and the models of accumulation and formation of oil and gas were complex in the area.The regularity of oil and gas pool formation is remained to be studied in the marine sedimentary basins of South China.The evolution and superimposition should be analyzed in the Paleozoic marine sedimentary basins and the Meso-Cenozoic nonmarine sedimentary basins together.The basic regularities of formation,migration and preservation of oil and gas should be studied.The further studies would be the effective reformation and superimposition of proto-type basins,the effective sources rocks,the effective preservation conditions and the effective petroleum systems.In the potential areas,comprehensive studies must be made in order to make a breakthrough in oil and gas exploration.The effective migration and pre-servation of oil and gas must be deeply studied in middle to long term exploration areas.