Abstract: In order to achieve the goal of evaluating the geological conditions of carbon dioxide storage and optimizing target areas in the Beibu Gulf Basin, based on the current status of geological condition evaluation technology for CO2 storage and oil and gas recovery utilization, a first level evaluation index system was created for the Beibu Gulf Basin that comprehensively considers factors such as geological storage potential, storage safety, storage economy, and environmental indicators, as well as second level indicators controlled by each first level index system. The fuzzy comprehensive evaluation method was applied to form a quantitative standard for evaluating the suitability of CO2 storage in the Beibu Gulf Basin. On this basis, combined with the fault development law and reservoir cap combination characteristics of the Beibu Gulf Basin, more than 50 oil fields and oil-bearing structures in the Beibu Gulf Basin were preliminarily selected. Among them, 6 oil fields and oil-bearing structures, including Weizhou A oil field, meet the conditions. Meanwhile, according to the index quantification system, the comprehensive evaluation value of CO2 adaptive geological storage in each oilfield was calculated to be 5.52-7.30, indicating that the comprehensive suitability evaluation of CO2 geological storage reached a moderate level, with Wushi D oil-bearing structure being relatively better.