[目的/意义]重大突发事件网络舆情极易引发公众恐慌，带来一系列的社会问题，全面剖析导致重大突发
事件网络舆情触发的多重因果路径，具有重要的现实意义。[方法/过程]采用NCA与fsQCA相融合的方法，选取
2020—2022年有关新冠疫情的90个网络舆情事件作为研究材料，基于PSR框架的视角，探究了舆论聚合、传播渠
道、权威媒体、公众关注、事件热度、时间跨度、危害程度7个前因条件的要素组态对重大突发事件中网络舆情触
发的影响机制。[结果/结论]研究发现，单个因素不构成重大突发事件中网络舆情触发机制的必要条件，单个因素
对重大突发事件中网络舆情触发的作用是有限的；挖掘出了9种重大突发事件中网络舆情触发机制的条件组态，
事件热度、权威媒体、公众关注为核心条件；归纳出重大突发事件中网络舆情触发机制的三种理论驱动模式，即事
件驱动型、权威主导型、公众诉求型。以期提高政府重大突发事件网络舆情引导的精度和效率，提高政府公信力。
[Purpose/significance] The network public opinion of major emergencies is very easy to cause public panic
and bring a series of social problems. It is of great practical significance to comprehensively analyze the multiple causal
paths that trigger the network public opinion of major emergencies.[Method/process] Using the method of integration
of NCA and fsQCA, this paper selects 90 Internet public opinion events related to COVID-19 from 2020 to 2022 as re?
search materials. Based on the perspective of PSR framework, it explores the influence mechanism of the factor configu?
ration of seven antecedents of public opinion aggregation, communication channels, authoritative media, public atten?
tion, event heat, time span and harm degree on the trigger of network public opinion in major emergencies.[Result/con?
clusion] It is found that a single factor does not constitute a necessary condition for the triggering mechanism of net?
work public opinion in major emergencies. The role of single factor in triggering network public opinion in major emer?
gencies is limited. This paper digs out the conditional configuration of the trigger mechanism of network public opinion
in 9 major emergencies. Event heat, authoritative media and public attention are the core conditions. This paper summa?
rizes three theoretical driving modes of the trigger mechanism of network public opinion in major emergencies, namely
event driven, authority led and public appeal. This paper aims to improve the accuracy and efficiency of the network
public opinion guidance of the government's major emergencies and improve the government's credibility.
