Abstract: Correlation effect exists in various industries. The competitiveness of China's industrial system depends on the cooperative development of each industry under the endogenous industrial linkage effects. In order to analyze the interactions between this industry and other industrial sectors, and entire industrial system and national economic system as well, a dynamic model is built based on the growth data of one of China's electronic and communication equipment manufacturing industry, which is computer, communications and other electronic equipment manufacturing. The research result shows that the weakening of industrial linkage effect exists in China's electronic and communication manufacturing industry and other industrial system. Therefore, it is suggested to focus more on the missing of endogenous linkage effect.