Abstract: Through analyzing the status and issues in the management of space for CO₂ geological storage both domestically and internationally, this study proposes suggestions for improving China’s relevant regulatory framework. Utilizing literature analysis and comparative research, it systematically reviews CO₂ geological storage regulations in the EU, US, Canada, UK, Russia, Kazakhstan, and other countries, including the EU CCS directive, the US class Ⅵ well regulations, Alberta’s carbon storage tenure regulation in Canada, and Russia’s subsoil law. These are contrasted with core domestic problems such as the lack of deep space management, undefined ownership rights, and resource conflicts in China. At the international level, a regulatory framework centered on specialized legislation has been established. This framework clearly defines the state ownership of space for CO₂ geological storage and implements full lifecycle management through a permitting system, covering site assessment, exploration permits, storage permits, and long-term liability transfer. In contrast, current domestic Chinese regulations fail to define the resource attributes of space for CO₂ geological storage, leading to unclear ownership and regulatory gaps. Conflicts arise from overlapping rights in deep space and mineral development, with a lack of management standards. Existing subsurface space management policies primarily focus on urban underground areas, and localized policy explorations for projects like salt cavern gas storage have yet to form standardized national-level rules. China urgently needs to establish a spatial management system for CO₂ geological storage. Firstly, legislation should explicitly define the state ownership of subsurface resources and standardize solutions for issues like overlapping rights. Secondly, a three-phase permitting system （exploration, storage, closure） should be established, along with long-term monitoring standards. Thirdly, space for CO₂ geological storage should be integrated into the territorial spatial planning system, and a national specialized plan for subsurface space resources should be formulated. This will provide the policy and institutional foundation for the safe implementation of CO₂ geological storage in support of China’s “dual carbon” goals.