[Purpose/significance] This paper constructs a performance evaluation index system of digital resource service in university libraries, and then uses the established performance evaluation model to make empirical analysis of the digital resource performance service of Hunan university libraries, providing scientific decision-making basis for taking measures to optimize and improve digital resource service performance of university libraries.[Method/process] From 3 dimensions of imput,process and influence, this paper constructed a performance evaluation index system of digital resource service in university libraries, which consists of 7 primary indexes and 19 secondary indexes. And then, this paper used the combined weighting model which is the combination of analytic hierarchy process method belonging to the subjective method of giving weight and CRITIC method belonging to the object method of giving weight to calculate the combination weight, and adopt the improved TOPSIS method to obtain the comprehensive evaluation value of the digital resource service of university libraries.[Result/conclusion] The digital resource service ability of university libraries in Hunan province is highly correlated with the type of university, and shows a significant difference. From the perspective of the factors influencing the service performance of digital resources in university libraries, there are obvious differences in the input cost, publicity, training and promotion and academic output of digital resources in university libraries, and the differences in the overall content, retrieval system, supporting services and utilization are slightly smaller. In the future, all types of university libraries in Hunan should not only optimize and improve the weak links of their own digital resource services, but also systematically improve the performance of libraries digital resource services from the multi-dimensional perspective of "input,process and influence".