Abstract:Shareholder diversity can provide diverse innovation resources for enterprises, but it also expands organizational distance and increases collaborative costs. To address the issue of how to balance the heterogeneity of innovation resources and the improvement of collaborative innovation quality, we explore the influence mechanism of major shareholder heterogeneity on the quality of collaborative innovation based on the fundamental theory of collaborative learning and the generalized higher-order ladder theory. It is found that majority shareholder heterogeneity hinders the improvement of corporate co-innovation quality, and the innovation resource effect brought by shareholder diversity does not offset the increased organizational synergy resistance due to their heterogeneity. The mechanism analysis reveals that the heterogeneity of major shareholders reduces the quality of collaborative innovation by expanding the organizational distance and creating organizational "rupture". In terms of governance mechanisms, market-based knowledge governance and social knowledge governance not only weaken the effect of majority shareholder heterogeneity on co-innovation quality, but also weaken the negative effect of organizational distance on co-innovation quality. Instead, authoritative knowledge governance exacerbates the hindering effects of majority shareholder heterogeneity and organizational distance on firms' co-innovation quality. The conclusion suggests that enterprises should not pursue too much differentiation and diversification in the process of aggregating innovation resources, and that they should seek like-mindedness among innovation subjects, while also focusing on improving the internal collaborative capacity of the organizations and constructing an effective mechanism for the aggregation of heterogeneous innovation resources in the enterprises.