Based on social network theory， it took A-share listed companies from 2011 to 2017 as the research sample to empirically test the relationship between the embeddedness of independent director network and enterprises’ diversification strategy， and discussed the moderating effects of slack resources and environmental uncertainty. The results show that both network centrality and structural hole abundance are positively correlated with the diversification strategy； both slack resources and environmental uncertainty positively moderate the relationship between network location and the diversification strategy， while the interaction between slack resources and environmental uncertainty negatively regulates the relationship between network location and the diversification strategy. After excluding various possible endogenous problems， the conclusions are still vaild. The conclusions have enriched the literature in the field of social network and have certain implications for enterprises to achieve diversified operations in a highly uncertain market environment.