Abstract:In order to explore the enterprises knowledge search openness strategy formulation under the background of diversification of innovation sources.From the perspective of patent, this paper constructs a theoretical model between the diversification of innovation sources and the enterprise knowledge search openness, explores the relationship between them.At the same time, this paper explores the adjustment functions of these variables including the technological diversity and the?firm size.Through the empirical test of the patent data, it is concluded that the diversification of innovation sources has a positive effect on the enterprise knowledge search width , but has a negative effect on the knowledge search depth. Meanwhile, the technology diversity first promotes the positive influence of the diversification of innovation sources on the enterprise knowledge search width, and then suppression this positive influence. The firm size promotes the positive influence of the diversification of innovation sources on the enterprise knowledge search width, and suppresses the negative influence of the diversification of innovation sources on the enterprise knowledge search depth.