Abstract：Crust-derived inorganic CO2 in the Yinggehai basin, northern South China Sea, has unique migration and accumulation characteristics, complex occurrence features and huge resource potential. Based on the present exploration and research extent, more than 1000 billion m3 of CO2 resources and 200 billion m3 of CO2 geological reserves are obtained in this basin. The latter rank first among China's CO2 geological reserves, which is also infrequent in the world. So the basin has quite large resource potential and comprehensive exploitation and utilization perspective. Because of the multiplicity, CO2 not only can be used in national economy and industrial and agricultural production but also is the main greenhouse gas that may cause the El Ni?觡o and seriously affect the global eco-environment and natural ecologic equilibrium. Therefore, how to exploit and utilize such a huge amount of CO2 resources comprehensively, bring its market potential into full play and accelerate economic development is now a crucial scientific and technological subject facing natural gas exploration and exploitation in this area.