Complementors play a key role in the formation and evolution of digital platform ecosystems and are one of the key assets that help platforms create and deliver value to customers. However， platform owners have an unstoppable power advantage， and value encroachment often occurs. Therefore， how the complementors manages the asymmetric dependency relationship with the platform owner is a problem that deserves continuous attention. It finds that although the complementors are in a weak position comparing to the platform owners， they will choose differentiated participation strategies according to their own resources and capabilities druing the evolution of the platform power situation， so as to obtain more rights and growth momentum. It proposes a bidirectional matching relationship based on platform power and the autonomy of the complementors， that is， the complementors with low autonomy is more likely to adopt the dependency participation strategy， while the complementors with high autonomy is more likely to adopt the utilization participation strategy. It deconstructed the strategic initiative of complementors within asymmetric dependency relationships， innovatively established a “power-autonomy” dynamic matching analytical framework， providing a novel theoretical perspective to understand the growth mechanisms of ecologically disadvantaged actors. Simultaneously， by revealing the power-dependency interaction mechanisms between platform owners and complementors， it not only offeres a theoretical foundation for addressing platform monopoly issues， but also provides actionable strategic pathways for complementors to break through constraints. This holds significant implications for promoting the sustainable development of digital ecosystems.