Using the data of questionnaire from family businesses in Zhejing and Chongqing et al, the author tests the influence of trust on network performance of family business The results indicate, first, trust has significantly positive influence on innovation and knowledge acquisition, but has no significantly influence on the duration of network, among which trust has significantly positive influence on the duration of network in the mix network; second, the duration of network has significantly negative influence on the market performance, but innovation and knowledge acquisition have no significantly influence on the market performance, among which innovation has significantly positive influence on the market performance in the personal relationship network, and innovation has significantly negative influence but knowledge acquisition has significantly positive influence on the market performance in economic network These results will help instruct the growth of family business in China