With the development of new media，social media is widely popularized and applied. At the same time，communication methods have also undergone tremendous changes. Modern communication technologies have brought huge challenges to the existing copyright protection system. How to strengthen the governance of copyright protection in the new media environment has become an important issue for social development. This article uses the literature analysis method，case analysis method，and combination of communication theory as the basis. The most popular social platform in WeChat，Weibo，Tiktok as a case study，from communication science Analyze the current situation of copyright infringement of social media in the new media era and analyze its causes，analyze the status and problems of copyright protection on social media，and propose corresponding strategies for the protection of copyright in social media.