With the rapid development of 5G technology, various types of reading promotion methods are becoming more and more diverse. While constantly seeking the depth of publicity content and publicity, university libraries also pay more and more attention to the optimization and innovation of publicity methods. In the 5G era, there are various ways of reading promotion, but due to the lack of a scientific and effective evaluation mechanism, it is impossible to provide readers with accurate reading services, so as to achieve the expected results. Through the disadvantages of traditional reading promotion activities, a new refined reading promotion model in the 5G era was introduced, and the types of reading promotion models, their elements and the necessity in the new era were explained. By comparing the traditional reading promotion with the reading promotion in the 5G era, the comparison was mainly made in terms of promotion content score, promotion effect, and user experience. The results found that the diversity has increased by 12 points, the legibility has increased by 11 points, the promotion effect has also been greatly improved, and the user experience rating has also been improved. It also illustrated the necessity of the current implementation of the library's refined reading promotion activities in the 5G era.