Abstract: The development of information technology and the emergence of the sharing economy provide opportunities for enterprises to achieve boundary-spanning sharing. Boundary spanning sharing has gradually become an important way for enterprises to obtain external resources and enter emerging markets. As a new inter-organizational cooperation and resource integration mechanism, boundary-spanning sharing is essentially the same as strategic alliances, but has the specific characteristics influenced by the sharing economy. Based on the analysis of the connotation of boundary-spanning sharing, this paper attempts to explore the new characteristics of strategic alliances in the sharing economy from four aspects:background, cause of continuous, scope of realization and innovation results. Finally, combined with the previous research of strategic alliances, the paper proposes the future research direction of boundary-spanning sharing, and emphasizes the importance of the study in the Chinese context.