Under the new double-cycle development pattern, the “Broadband China” strategy, as an important digital infrastructure's implementation plan, has an important impact on the green innovation of family enterprises through the upgrading of industrial structure in the context of the second-generation involvement. The research finds that digital infrastructure construction promotes the green innovation of family enterprises. Digital infrastructure construction promotes green innovation of family enterprises through rationalization and upgrading of industrial structure. At the same time, the second-generation involvement positively moderates the relationship between the rationalization of industrial structure and the green innovation of family enterprises, and negatively moderates the relationship between the upgrading of industrial structure and the green innovation of family enterprises. Further analysis finds that the promotion effect of digital infrastructure construction on the green innovation of family enterprises is more significant in the comprehensive leading provinces and family enterprises under the actual control of second-generation, and it will finally improve regional environmental performance. The conclusion will contribute to the long-term and sustainable development of family businesses, and provide important policy insights for China to achieve the goals of “carbon peaking” &“carbon neutrality” in the global digital wave.