Abstract:While changing the way of production and life, the Internet also provides a wider channel for the public to express their opinions. The development of mobile Internet and we media makes everyone can become the producer, publisher and distributor of network information , and the lack of legal and moral awareness caused by the virtual nature of the network makes online rumors harder to govern. As an important part of the governance of the Internet society, the publication and implementation of the "Cybersecurity Law of the People's Republic of China " and the corresponding policies, making the legal governance system of online rumor tends to complete. On the basis of clarifying that all social subjects should actively participate in the governance of the online rumor, this article analyzes the current legal system of online rumors and the real changes brought by the "Cybersecurity Law of the People's Republic of China ", aim to offer advice for the construction of a clean and civilized cyberspace in China.