Abstract: In the mobile Internet environment, university libraries have built wechat public platform to expand the service mode and content. This paper analyzed the status quo of wechat service platform in Tianjin's universities by using the platform of "Qingbo Index", and analyzed the existing problems from the aspects of external features, promotion and popularization, service content and popular tweets, and put forward some suggestions for further improvement, to provide reference for the construction of wechat platform in university library.