It has been acknowledged by an increasing number of enterprise management tiers that tacit knowledge is flexibly applied for promoting the competitive advantage of an enterprise. In this paper, the influences caused by the tacit knowledge of individuals and organizations on the knowledge innovation and knowledge integration of an enter-prise are analyzed as well as the theory of action exerted by the knowledge innovation and knowledge integration on the sustainable competitive advantage of an enterprise. The results show that, tacit skills, tacit experiences, tacit affection, tacit convention and tacit environment have a markedly positive impact on knowledge innovation and knowledge integration, and the most obvious factor is tacit experience. Both the knowledge innovation and the knowledge integration may improve the sustainable competitive advantage of an enterprise. In this paper, the authors propose a framework for their theoretical hypothesis. Through the use of a questionnaire, as well as by combining the collected data and using the structure equation model, the proposed hypothesis is tested and analyzed.