Abstract:With the emergence of a large number of complex projects, seeking external complementary knowledge resources to carry out cross-organizational project cooperation has become an important way for organizations to complete project tasks. This paper focuses on the strategic choice of both sides of the game in the cross-organization project cooperation, constructs the game model and solves the evolutionary stability strategy, and uses simulation software to analyze how the relevant factors affect the game results. This study found that the knowledge storage capacity, the degree of knowledge sharing, the proportion of complementary or heterogeneous knowledge, the ability of knowledge absorption and re-creation, the sharing of synergistic value, the knowledge sharing incentive factor and the speculative default cost are positively correlated with the knowledge sharing behavior. The knowledge sharing expenses, the speculative income value, the knowledge leakage risk coefficient and the knowledge sharing behavior are negatively correlated. The sharing synergy value distribution coefficient within a reasonable range will promote the knowledge sharing behavior.