Abstract: In recent years, water electrolysis for hydrogen production and hydrogen fuel cells have seen widespread applications. However, hydrogen storage technology—the critical bottleneck in hydrogen energy utilization—remains a major challenge in the field. Graphene exhibits promising potential for solid-state hydrogen storage owing to its high specific surface area, abundant porous structures, lightweight yet dense nature, and excellent chemical and thermal stability. Nevertheless, pristine graphene lacks functional groups and demonstrates low hydrogen binding energy, limiting its commercial viability for hydrogen storage. To address this, metallization modification, doping, and composite formation have emerged as effective strategies.This study systematically summarizes the fundamental properties of graphene, explores methodologies for metallization-modified graphene materials, and focuses on advancements in hydrogen storage performance of alkali metals, alkaline earth metals, transition metals, and high-capacity hydride-modified graphene systems. These breakthroughs not only establish a theoretical foundation for metalized graphene-based hydrogen storage materials but also provide innovative pathways for their practical development and commercialization.