Abstract:This paper explores the effect of inter-firm behaviors, including specific investments, cooperative R D and inter-organization learning to co-innovation performance, and the moderating effect of corporate social responsibility. By a survey questionnaire and interview with enterprises in China, enterprises scale and age, and cooperative experience as control variables, the theoretical model is empirically analyzed and tested. The results show that social responsibility significantly enhances the positive effect of specific investments to co-innovation performance, however the positive effect of specific investments to co-innovation performance is not significant; Cooperative R D and inter-organization learning can increase co-innovation performance and corporate social responsibility can increase the positive effects of them.