Abstract: State-owned fission digital platform enterprises are key entities for optimizing the main business structure of the state-owned enterprises, enhancing the core capabilities, and supporting the implementation of national strategies. However, the growth mechanisms of these enterprises remain unclear. The research findings are as follows: (1) The strategic orientation constitutes the growth motivation of state-owned fission digital platform enterprises, driven by the synergy between the parent company's mission and the subsidiary's objectives, and evolves from technology-oriented to market-oriented through the social dominant logic. (2) The opportunities arising from external demands and internal foundations serve as the intermediary bridge for these enterprises to transition from motivation triggering to capability cultivation. By identifying potential pain points based on existing strengths and exploring potential needs through reconstructed advantages, they provide critical impetus for corporate growth. (3) The dynamic capability is the core driving mechanism for state-owned fission digital platform enterprises to achieve growth. It inherits the resources of the parent enterprise and develops its own resources. Through the enhancement of platform capabilities and the construction of platform capabilities, it promotes the enterprise's growth from dependence to independent extension, achieving sustainable development. The above conclusion deepens the understanding of the dual attributes of state-owned fission digital platform enterprises as parent state-owned enterprises and innovation platforms, enriches the relevant researches on fission enterprise growth and MOA theory, and provides reference for promoting the improvement of state-owned enterprises'main responsibilities and core competitiveness.

Key words: state-owned enterprises, state-owned fission digital platform enterprises, growth mechanism, MOA theory