The Upper Paleozoic oil and gas resources in the southern Maling Area have great potential, and it has become an important exploration target in the Ordos Basin. Based on the research of geological characteristics and development status, the oil and gas enrichment rule of Chang 8 Reservoir in this area is analyzed through the statistical results of test and analysis data. The results show that the distribution of Chang 8 Reservoir is related to the thickness of Chang 7 source rock, the main belt of oil storage sand body is clear, and oil and gas accumulation is controlled by reservoir physical properties and sedimentary facies, and also may be controlled by structure in a small scope, and then related to pore structure and wettability.