Abstract:Small and micro enterprise is an important driving force for social economic growth. In recent years, China vigorously encourages business startups, the number of small and micro enterprises is growing rapidly, but in the development process, small and micro enterprises are facing with many troubles, such as the lack of core technology and the internal growth factors of going-concern. Based on this, this paper analyzes the impact factors of small and micro enterprise’s innovation by social network, the study found that the strength, size and stability of small and micro enterprise’s 7 kinds of main social network, have a significant positive impact on innovation ability, and the improvement of innovation ability, in a certain extent, can bring innovation performance for small and micro enterprises.