Abstract: The progress of greenhouse gases geological sequestration projects in major developed countries was introduced, and current research status of CO2 geological sequestration and the progress of demonstration-scale projects in China were briefly reviewed. There were three types of CO2 geological storage sites, i.e. deep unminable coal seam, deep saline aquifers and depleted oil/gas field. The advantages and disadvantages of these sites were described and compared. Meanwhile the potential of geological sequestration in China was analysed based on the documentary analysis and material research. Finally, it was pointed out that the potential of CO2 geological sequestration in China was large and CO2 geological sequestration was of great significance for China’s greenhouse gas emission reduction and socio-economic development.