Abstract: 【Purpose/significance】Focusing on the current situation of frequent occurrence of the reversal of Internet public opinion,
this paper clarify the generation mechanism of Internet public opinion reversal, so as to effectively deal with the challenges faced by In? ternet public opinion emergency management【. Method/process】Based on the information ecological perspective, this paper establishes a network research framework for the population relationship of Internet public opinion ecosystem. This paper uses the fuzzy set quali? tative comparative analysis method to explore "the joint effect" of seven factors : the authority of starting subject, the relevance of Inter? net users, the authority of communication subjects, the tendency of communication subjects, the intuitiveness , content sensitivity of initial information content and the duration of public opinion, to identify the causes and configuration paths of the reversal of Internet public opinion【. Result/conclusion】The configuration paths of the reversal of Internet public opinion can be summarized into two types: the continuous fermentation of key population leading public opinion information and the rapid reversal of public opinion information guided by managed population. Sensitive Internet public opinion information, as the core condition of network public opinion reversal, interacts with difficult control key communities and continuous intermittent management communities as the main force to promote the reversal of Internet public opinion, and the free and inclusive support communities is auxiliary conditions.【Innovation/limitation】Based on information ecology, this paper constructs the research framework of the generation mechanism of the reversal of Internet public opinion, and analyzes the generation mechanism of network public opinion reversal from the perspective of configuration, so as to provide new research ideas for the research of the reversal of Internet public opinion.