At present, with the demand for digital resources service of the public is becoming increasingly individualized and specialized, the traditional service model centered on libraries cannot effectively provide digital resources service. It is urgent to promote the deep integration of the Internet and socialized service of digital resources in universities. Based on the literature review, the paper sorts out the connotation evolution of the socialized service of digital resources in universities from four aspects: resource type, service providers, service demand and service mode. Then, this paper analyzes the development trend of the socialized service of digital resources in universities in the "Internet +" era from five aspects: the cross-border integration of service providers, the precise provision of service content, the user-oriented service process, the three-dimensional interconnection between online and offline, and the extension of value-added services. Finally, according to the previous theoretical analysis and guided by the Internet thinking, this article establishes the model of the socialized service of digital resources in universities based on "Internet +", which integrates all kinds of service providers and online and offline services.