At present，the technology of artificial intelligence (AI) is maturing day by day, but the development of “Information Cocoons” makes the audience become “aborigines” of “information isolated island”, which shackles the free flow and transmission of information, leads to the increasing spiral of silence, and weakens the role of “gatekeeper” of news. Computers implicitly match similar information to audiences through big data and recommend similar news transmission for users, which has the function of dispelling and weakening the mainstream ideology. The audiences will be in the dilemma of “information cocoons” woven by themselves. Therefore, it is necessary for the supervisors of the mainstream ideology to firmly grasp the right of discourse, change the way of discourse, improve the reform of information supply side and occupy the main battlefield in the network field to prevent the main space in the ideological field from being squeezed and shrinking.