Enterprises build an innovation ecosystem of value co-creation through the network collaboration of innovation entities, so as to perceive and adapt to the changes of the digital environment in the digital era. Therefore, it is necessary to explore the generation mechanism of the digital innovation ecosystem. Taking Huawei Automobile as the research object, the rooted analysis method was adopted and the construction mechanism and evolution path of Huawei Automobile digital innovation ecosystem was studied based on the theoretical perspective of dynamic capability. The findings are as follows. The digital innovation ecosystem built by digital innovation enterprises goes through three stages, with three evolutionary paths and four capabilities. The three stages are the innovation ecosystem of integrating digital resources, expanding digital resources and sharing digital resources. The three evolutionary paths are market demand, cross-border communication and network collaboration. The four abilities are information sensing, resource integration, resource acquisition and resource reorganization. The digital ecological environment and dynamic capability are the internal driving force to promote the continuous evolution of the digital innovation ecosystem, so that the organizational framework of the system is constantly upgraded, more innovation entities are derived, and a network collaborative framework is formed. The research conclusion has theoretical guidance and practical value for digital innovation enterprises to build digital innovation ecosystem.