Based on the research results of 76 empirical studies on corporate social capital and corporate performance, this paper uses meta-analysis to re-study the relationship between corporate social capital and corporate performance to overcome the problem such as sample represents insufficiency or sample amount inadequacy and so on. The authors firstly comprehensively estimate the correlation coefficients between performance and the internal and external corporate social capital in such three dimensions as structure, relation and cognition and then use regression analysis to examine the relative effect of the internal and external corporate social capital at different dimensions on corporate performance after the control of the correlation of different dimensions of social capital. The results show that the influence of the three dimensions of both internal and external corporate social capital on corporate performance is positively significant, that in internal social capital, the influence of cognitive dimension on corporate performance is obviously bigger than that of structural dimension and correlation dimension, and that the influence of three dimensions of external corporate social capital on corporate performance is not significantly different.