Taking A-share listed companies from 2009 to 2018 as a sample，the influence of executive chain network on the synchronization of company stock prices was empirically tested. The results show that the executive chain network can improve the company''s stock price synchronization, and the more central the listed company is in the executive chain network, the higher the stock price synchronization; From two aspects of convergence and information transparency executives chain network to further analysis the mechanism of action of stock price synchronicity, not by lowering the company found that executives chain network transparency this way affect stock price synchronicity, but because the chain executives to strengthen the behavior study, between the listed company information and resources sharing, prompted the company basic characteristics between convergence, Thus improving the synchronization of the company''s stock price; According to the different types of linkage, the executive network can be divided into director network, supervisor network and executive network. The empirical results show that the executive network has the largest improvement effect on stock price synchronization, followed by the director network, and the supervisor network has no significant effect on stock price synchronization. After distinguishing property rights and legal environment, we find that in state-owned enterprises and enterprises with poor legal environment, executive chain network has a more significant effect on improving stock price synchronization. The conclusion provides theoretical support for improving the information efficiency of capital market.