以企业创新投入和内生技术溢出水平为企业合作R&D的资源投入,建立并运用三阶段双寡头博弈模型来描述合作创新中的机会主义行为,明确了资源投入中机会主义的行为动机和行为影响刻画.研究结果表明:机会主义对企业合作R&D打击巨大,然而多层次深度合作和关键资源投入阶段的机会主义行为防范有助于合作R&D的稳定;机会主义动机会受到市场规模和创新水平的激励.政府应大力提倡企业间多层次深度的合作研发,而同时打击企业机会主义行为. Based on the input of enterprise innovation and endogenous technology spillover, this paper establishes and applies the three-stage duopoly game model to describe the opportunistic behavior in cooperative innovation, clarifies the motivation and behavior of opportunism in resources input The results show that opportunism has a tremendous impact on the cooperation R & D, however, the prevention of opportunistic behavior at the multi-level and deep cooperation and key resources investment stage contributes to the stability of cooperative R & D. The opportunism motivation will be stimulated by market size and innovation level The government should vigorously promote multi - level and deep cooperation between enterprises in research and development, while at the same time cracking down on opportunism in enterprises.