Abstract: The modernization of harmonious coexistence between humans and nature is a distinctive feature and essential requirement of Chinese modernization. The international communication narrative system for building a modernization of harmonious coexistence between humans and nature aims to comprehensively, from multiple perspectives, systematically present to the international community the vision and values of the Chinese modernization of harmonious coexistence between humans and nature. It is a key measure for effectively telling China's ecological story in the new era and enhancing the effectiveness of China's international communication on ecological issues. In terms of narrative strategies, the international communication of the modernization of harmonious coexistence between humans and nature should be guided by the concept of a "community of life" to transcend "localized" narratives, promote and inherit traditional Chinese ecological wisdom, and break through cognitive barriers through cultural commonalities. In terms of narrative logic, it is necessary to construct a narrative framework that is "reliable, admirable and respectable", grounded in shared values and widely accepted. It is recommended to construct a narrative system for the modernization of harmonious coexistence between humans and nature from multiple dimensions, including enhancing the capabilities of communication actors, optimizing the content of external discourse, improving the development of innovative communication platforms, and optimizing the digital ecosystem for international communication.