///From viewpoint of CO2 storage underground,the geological characteristics of Jizhong Depression were studied,including its geological background and tectonic evolution. It is proposed that there are three sets of sequences that can be used to store CO2. The rock properties, trap types, hydrogeological feature and structural stability were discussed as well. Potential CO2 storage capacity was evaluated. The storage capacity was 5.73×108~9.53×108 tons CO2 in buried hills and more than 1 billion tons in Guantao Group. The authors suggested that Jizhong Depression could be a candidate site for CO2 storage underground.