With the development of network techniques and 4G smart phones，the webcast has become a new media platform for people’s daily life and entertainment. At the same time，there are also ethical anomies such as live pornography，violence and privacy violations. Based on the analysis of the chaotic phenomenon of the webcast，this paper studies the causes of ethical anomie of the webcast from the webcast platform，network live broadcaster and audience，and puts forward the comprehensive management measures.