Abstract: [Purpose/Significance] As a new interdisciplinary field of humanity and technology, the research on big knowledge graph of cultural heritage associated and integrated cultural heritage resources,which applied the intelligent theories and methods is the key to the "living" of cultural heritage and is of great significance to the inheritance and development of Chinese excellent traditional culture. [Research design / Method] From the perspective of knowledge association, applied  the methods of literature analysis and expert investigation, this paper had systematically surveyed the current theories and methods for big knowledge graph of cultural heritage, constructed the theoretical framework and method system for research on big knowledge graph of cultural heritage, and analyzed the future research trend. [Conclusion / Discovery] To promote the research on big knowledge graph of cultural heritage, it is crucial that the knowledge association should be taken as the foundation, the cultural genes is taken as the core, the integration and innovation of interdisciplinary theories should be strengthened, a knowledge-driven method system should be built further combined with new technologies such as brain computer integration and metaverse.[Innovation / Value] It is the innovation point that the theoretical framework, method system and research trend for big knowledge graph of cultural heritage from the perspective of knowledge association had been put forwarded.

Keywords: Cultural heritage, Big knowledge graph, Knowledge association