The rise of short videos provides a new stage for librarians to present their self-image.The article analyzes librarians'self-presentation behaviors in short video platforms with the help of dramaturgical theory and virtual ethnography,with a view to exploring the self-presentation logic of this group and providing references to improve the social image of this group.It is found that librarians in short video platforms mainly present five types of images:busy and dedicated"workers",erudite and wise reading promoters,patient and enthusiastic science popularizers,rigorous and meticulous professionals,and life-loving artists.In the practice of self-presentation,librarians have adopted the strategies of positive idealized narrative,dramatized complicity,backstage performance and symbolic expression.The overall analysis shows that librarians'self-presentation has the positive value of deconstructing public's stereotypes,satisfying public's information needs,and narrowing the psychological distance with the public,but at the same time,there are limitations such as heavy traces of performances,homogenization of paradigms,and weak social impact.Based on this,librarians can optimize the practice of short videos from the dimensions of weakening the traces of performance,improving media literacy,deepening the backstage forward,and grasping the attention grabbers,so as to create a better media image.