Abstract: Based on the theory of strategic alliance and social network, 208 technology enterprises are used as the sample to investigate the relationship between alliance partnership, network embedding and alliance performance. The results show that: the alliance partnership has a positive effect on the performance of the alliance; the network intensity plays a mediating effect in the relationship between trust, communication, information sharing and alliance performance; network stability plays a mediating effect in relationship between trust, communication and alliance performance, but it does not play a mediating effect in relationship between information sharing and alliance performance. Based on the empirical research, this paper proves the mechanism of alliance partnership on alliance performance, further expanding the theoretical basis of establishing strategic alliance, and has important enlightenment significance for enterprises within the alliance to use the alliance internal and external network to acquire knowledge and resources and enhance alliance performance.