Abstract:      In the era of digital economy, employees′ digital identity plays an important driving role in the digital transformation of enterprises, but there is still a lack of indepth research on how employees′ digital identity affects business model innovation. This study, based on the social identity theory, introduced two variables of extra-role behavior and platform-type leadership, constructed a moderated mediation model, and used the latent moderation structural equation (LMS) method to test the model. The research found that: (1) employees′ digital identity has a significant positive impact on business model innovation; (2) External behavior plays a mediating role between digital identity and business model innovation; and (3) Platform-type leadership not only strengthens the relationship between digital identity and extra-role behavior, but also enhances the mediating effect of digital identity on business model innovation through extra-role behavior. The research results have enriched the theoretical research on human resources and innovation management in the digital age, revealed the intermediary mechanism and boundary conditions of digital identity affecting business model innovation, and will provide theoretical references and practical suggestions for digital transformation enterprises to achieve business model innovation from a micro perspective.

Key words: digital identity, extra-role behavior, platform-type leadership, business model innovation