Abstract:The global cyberspace security situation continues to evolve, with the external environment becoming increasingly severe. Cybersecurity issues constantly affect politics, economy, military affairs, culture, scienceand technology, and other fields. In order to effectively prevent significant cyber threats and improve cyberspace autonomy and right of voice, we need to clearly understand the security challenges to cyberspace, implement the security protection of critical information infrastructure, and focus on strengthening the data security and supply chain security, so as to establish and improve the national cyberspace security system.