As carbon peak and carbon neutrality development strategy and the social and economic development continuously require petroleum and other energy，CO₂ flooding and storage technology has met great development opportunities，as well as unprecedented challenges. According to the research status of CO₂ flooding and storage both in China and abroad，the problems and the future trend of CO₂ flooding and storage are introduced by analyzing the mechanism and influencing factors of CO₂ flooding and storage. Based on practice，the research contents of CO₂ flooding and storage are summarized as six aspects，namely，target optimization，experimental study of relevant mechanisms，technical breakthrough，economic evaluation，safety evaluation，and field practice. The problems of CO₂ flooding and storage include①CO₂ flooding and storage technology is applied to very limited types of reservoirs. ②The distribution characteristics of the CO₂ gas field and its temporal and spatial matching relationship with target reservoirs of CO₂ flooding and storage have not been paid enough attention. ③There are still many problems in the study of CO₂ flooding and storage mechanism. ④CO₂ flooding and storage scheme design needs to be optimized. ⑤The economic effectiveness evaluation system of CO₂ flooding and storage has not been established. ⑥The tracking assessment of CO₂ storage safety still faces a series of problems. The future trend of CO₂ flooding and storage technology research includes①Exploring the applicable reservoir types and development stages of CO₂ flooding and storage. ②Studying the distribution law of the CO₂ gas field and its temporal and spatial matching relationship with suitable reservoirs of CO₂ flooding and storage. ③Deepening studies on the CO₂ flooding and storage mechanism. ④Optimizing CO₂ flooding and storage scheme design. ⑤Evaluating the economic effectiveness of CO₂ flooding and storage. ⑥Conducting CO₂ storage safety tracking monitoring and evaluation.