The sharing of digital education resources can play a role in the radiative effect of high quality resources in colleges and universities. At present, The shortage of high-quality digital education resources is the prominent problem of resource sharing in colleges and universities. From the perspective of supply side, this paper proposes the sharing model of digital education resources and analyzes the supply bottleneck of sharing of digital education resource. On the one hand, the sharing concept of resource suppliers is weak. On the other hand, the role of resource demander is single, which makes it difficult to transform into a resource supplier. In view of the supply bottleneck, this paper puts forward the strategy of adhering to the concept of sharing development, building a distinctive resource base and the combination of government leading and policy guidance.