This study aims to empower research on national parks by systematically reviewing the evolutionary trajectory and knowledge framework of green infrastructure research. The findings indicate that: (1) Green infrastructure is a frontier area of international research. It is a strategically planned network of natural and semi-natural areas and other environmental features, playing an increasingly prominent role in fostering a harmonious relationship between humans and nature and in promoting sustainable development. Its development has undergone four evolutionary stages: ideological emergence, conceptual formation, functional expansion, and systemic governance. (2) Empirical studies on green infrastructure mainly focus on three major themes—health and well-being, public policy, and climate adaptation—all of which are closely related to the core issues of national park conservation and development. (3) The national parks currently being established in China have become green infrastructure that safeguards ecological security and social development. Future research should address three key dimensions—multiple stakeholders, spatial scales, and service allocation—by examining issues of equity and justice in the distribution of ecosystem services between humans and non-human actors, such as flagship species and keystone vegetation. By advancing a multi-scale collaborative spatial governance approach, such research can drive theoretical and practical innovations in green infrastructure. In summary, this study reveals the profound theoretical linkages between green infrastructure and national park research, contributing to the development of China’s national park-based protected area system and fostering an inclusive vision of territorial spatial planning, while also offering Chinese insights to global ecological governance.