This paper takes 52 library micro-film from network media as the studied sample. The studied micro-film have entire plots and complete stories and were produced systematically.This study focuses on four aspects to investigate selected micro-film, including physical property, content format, advertising method and library type. It is analyzed that library micro-film social media marketing mode has incomplete elements in the aspects of name of producing micro-film, logo, film contents and film formats, and unclear marketing purposes exist in video making source, video format and micro-film advertising methods. Regarding library social media marketing strategy based on micro-film, it is recommended that we should take solving actual problems as the starting point, forge the long-term micro-film making team, establish the long-term broadcasting and advertising mechanism as well as facilitate readers to view the micro-film in a more convenient manner.