Abstract:This study aims to explore the security strategy of digital power grid communication information network based on cloud edge collaboration. Firstly, through extensive literature analysis, survey questionnaires, and other methods, the main security threats and security needs faced by the digital power grid communication information network were identified. Secondly, based on this, a network security guarantee strategy centered on cloud edge collaboration is proposed, including multi-level solutions such as resource sharing, real-time monitoring, and data encryption. Next, we evaluated the strategy from three perspectives: security, reliability, and usability, and verified its effectiveness and feasibility through simulation experiments. Finally, the conclusion indicates that the security strategy of digital power grid communication information network based on cloud edge collaboration can effectively improve the security and stability of the digital power grid, and has strong practical application value.