Abstract:Faced with rising external uncertainties and internal growth transition, securing industrial and supply chains through digital means is essential for high?quality development. This study investigates the effect of firm?level digital technology collaborative innovation on supply chain resilience, using data from A?share listed firms between 2010 and 2023. Two analytical perspectives are adopted: information sharing and resource allocation. Digital collaborative innovation is found to significantly enhance resilience. This effect operates through two mechanisms. First, information sharing is broadened and deepened, which reduces asymmetry and coordination costs. Second, the allocation of capital, labor, and technology is optimized, which facilitates inter?organizational resource flows. Heterogeneity analyses show that the effect is stronger for firms in growth or mature stages and with low transaction costs, and for firms located in eastern regions or under strong intellectual property protection. Further evidence indicates that supply chain disruption risks are lowered through the breaking of information barriers and the correction of resource misallocation. This study extends the theoretical framework on digital transformation and supply chain resilience from a collaborative innovation perspective, and offers empirical support and policy implications for differentiated digital policies.