In the background of incubation network, the paper studies how incubated enterprises gain cognitive social capital through embedding in the network, obtain intangible resources effectively in the resource-sharing environment and improve their innovation performance. We construct and analyze the theoretical model of cognitive social capital, intangible resource acquisition and innovation performance. The incubated enterprises need to strengthen cognitive social capital accumulation through incubation network; it effects the ability of intangible resource acquisition, then helps start-ups improve innovation performance.