The rapid development of network information technology has brought a series of complex information resources. The digital library information service resources are also in this range. Obviously, with big data as a mean, it is necessary to analyze and integrate the massive data. Therefore, under the background of big data, the reform of concept, resources, technology and strategy of digital library information service will be helpful to strengthen the integration of resources and user needs. This paper first puts forward the influence of big data to the digital library information service, and then introduces the content of digital library information service. It introduces the purpose and characteristics, and finally leads to the data service mode of digital library.