Taking the e-teaching materials service of university libraries under the COVID-19 as the research object, by investigating the articles pushed by WeChat official account of "Double First-class" university libraries, an in-depth analysis of the content of articles involving e-teaching materials services is conducted and the problems existing in the e-teaching materials services of university libraries are summarized as well, including insufficient service content, insufficient precision service, uneven service level, copyright risks of electronic teaching reference, lack of sharing and cooperation platform, etc. On this basis, starting from the necessity and feasibility of e-teaching materials services, suggestions for promoting the e-teaching materials services of university libraries are put forward in order to provide references for e-teaching materials services of university libraries.