In the era of new media, the space for public opinion development is expanding in the rise of public discourse, the online world is full of various voices, and public opinion plays an important role in all aspects of society. At the same time, the accelerated development of media technology has expanded the ways of social participation, and the public is able to use multiple ways to know society. Therefore, it is necessary to study the irrationality of online public opinion in the new media era. This paper takes irrational expressions in online public opinion as the research object in the new media perspective, explores the ecological status of online public opinion expressions in the new media environment, further deciphers the negative social benefits behind it, and uses it as the basis to analyze the paths to channel irrational expressions in online public opinion from the perspectives of three subjects: mainstream media, opinion leaders, and netizens.