Digital infrastructure considers the advantages of traditional infrastructure and high‐tech information technology and can optimize the allocation of green resources in the service industry to a large extent. Based on the calculation of the level of digital infrastructure in 30 provinces and cities in China from 2011 to 2020, this study analyzes the impact of digital infrastructure on the resource allocation efficiency of the service industry from a theoretical and empirical perspective. The study found that digital infrastructure can improve the efficiency of green resource allocation in the service industry; however, at the subdivision level, only its operation dimension has a significant and positive impact on the efficiency of green resource allocation in the service industry, and the improvement effect of the construction dimension is insignificant. Analyzing the mechanism of action shows that digital infrastructure can indirectly optimize the allocation of green resources in the service industry by deepening the degree of informatization and improving the level of innovation. Further analysis shows that the impact of digital infrastructure on the efficiency of green resource allocation in the service industry presents a complex nonlinear trend and regional heterogeneity. The research conclusions provide a policy reference for optimizing the allocation of green resources in the service industry and promoting high‐quality economic growth under the background of digital infrastructure.