Nowadays, we have to admit that the Internet is gradually becoming indispensable to human beings. Almost all people use the Internet. While it brings convenience to people, it undoubtedly brings many problems as well. Adults already have the ability to judge right and wrong from the Internet, but for teenagers, the network is a double-edged sword. A few teenagers get better use of the network to promote their own learning, but most of the teenagers will be used by the network to indulge in games, swearing, spreading false information, and even some unruly behavior. This paper uses the method of literature review to study the causes of this phenomenon from different perspectives (like individual family school government) and try to find effective solutions. It is not only of great value and significance to analyze the causes of teenagers' network moral anomie and find effective solutions, but also the realistic demand to lead teenagers' healthy growth. Solving the problem of adolescents' online moral anomie requires the joint efforts of adolescents, families, schools and society in order to achieve significant results.