Abstract: Based on social network theory, resource-based view and the growth curve model, the effects of intra-community structure dynamics (intra-community stability, intra-community expansion) and inter-community structure dynamics (inter-community expansion) on enterprises’ innovation performance in the innovation network under different technology life cycle stages are investigated. Using SDC database, USPTO, JPO, EPO and the national patent database of the sample enterprises, the empirical research is carried out with the alliance enterprises in the field of communication equipment as samples. The results show that in the technological emerging period, inter-community expansion have a negative impact on innovation performance; in the technological growth period, inter-community expansion and intra-community stability has a positive impact on innovation performance; in the technological maturity stage, intra-community stability has a positive impact on innovation performance, while intra-community expansion and inter-community expansion have a negative impact on innovation performance. On this basis, the paper puts forward policy suggestions to improve enterprises’ innovation performance by adjusting the innovation cooperation network in different life cycle stages.