In recent years，the Internet has developed rapidly，and the phenomenon of reversal of online public opinion has emerged one after another. The study conducted a statistical analysis based on the case of reversal of public opinion in 2020 as a sample，and analyzed the deep-seated reasons and mechanism of the reversal of online public opinion in the new media era. In particular，the article studied the characteristics of each stage of public opinion occurrence，reversal and clarification. From this，we proposed a network public opinion governance strategy of “multiple participation，multiple interaction，and collaborative governance of the government，platforms，media，and netizens”，so as to create a clear and upright online public opinion space.