The change of news communication paradigm has changed the identity and behavior logic of news organizations and journalists.People regard the objective authenticity and publicity of news media as the basis for the good operation of news public opinion supervision.However，under the commercial circumstance，the news media cannot provide the common experience for heterogeneous population or provide a freedom public sphere .The objectivity and publicity of the news is challenged by public.The public cannot form a comprehensive understanding and expression because of one-sided reporting and fabricating facts.Setting agenda and“re-feudalization”hinder the free exchange of views and expressions.Imperfect public expression mechanism results in biased news media supervision and ineffective decision-making and the action.We can realize that，under the situation of the anomie of news public opinion supervision，not only good professional ethics have not yet been established，but also the traditional authority control has gradually failed.We need to take diverse legal means to establish a regulatory system for regulating the conflict between news realities，citizens' rights and commercial capital.