Abstract: The information control behavior in internet public opinion reversal can change the evolutionary direction of public opinion events by influencing the interpretation and attitude of information audiences,during the process of which new social risks are stimulated.According to the inductive combing of 50 widely discussed cases of internet public opinion reversal that occurred in 2016-2022,it is found that information control behaviors in internet public opinion reversal on the one hand take information content and cognitive framework as the control objects,and on the other hand social risks derived from information control behaviors may be transmitted to political and non-political domains.According to the results of the analysis,internet public opinion reversal can be classified into "leveraging type","uncontrolled type","reef type",and "crisis type",with "information control mode" and "risk transmission direction" as the core dimension division.After analyzing the four types,it is found that the evolution of the internet public opinion reverse is accompanied by the derivation,transmission and accumulation of social risks,forming a dual structure of "surface public opinion + deep social risks",which not only causes serious harm to social order and political stability,but also triggers the inertia of people's political distrust and becomes an important cause of mass incidents.Therefore,changing the separation of internet public opinion control and risk management and strengthening the risk management process in internet public opinion is the key to preventing and resolving the derivative social risks and their transmission in the process of internet public opinion reversal.On the one hand,the public sector should further strengthen the regulation and standardization of information dissemination and enhance its own information dissemination influence and competitiveness to dissolve information control behaviors;on the other hand,the public sector should create a flexible and rigid public opinion field and actively respond to the demands of groups in public opinion events to ease the derivation and transmission of risk energy.

Key words: internet public opinion, internet public opinion reversal, risk transmission