According to the seven years input-output table of the National Bureau of Statistics, the social network analysis to draw the seven years of industrial structure network topology was used. From the network density, centralization, centrality, and cohesive subgroups, the characteristics of China's industrial structure network since 2002 was analyzed, and the empirical study on China's industrial structure change was conducted. Through the results analysis, China's industrial structure has diversification and the characteristics, the link between the industry sector has volatility, the industry sector status in the industrial structure is unequal, but the status of the gap between the industry sector tends to decrease. China is now in the late stage of industrialization, has begun into the post-industrial era. The importance of the secondary industry has declined. The third industry began to rise, the importance of the third industry is more and more prominent, and its influence is gradually increasing. industry cohesive subgroups of frequent changes will continue, Even more dramatic things can happen.