Abstract: 【Purpose/significance】Identifying and analyzing the key influencing factors and correlation paths of social media users′ emotional experience in major emergencies, so as to provide theoretical and applied reference for the government to manage public opinion of major emergencies【. Method/process】Based on the perspective of information ecology, the index system of influencing fac⁃ tors of social media users′ emotional experience in major emergencies was constructed from five dimensions of event information, infor⁃ mation publisher, information audience, information environment and information technology. Combined with Decision Laboratory analysis (DEMATEL) and Explanatory Structure model (ISM), the key factors were analyzed and the hierarchical model was con⁃ structed.【 Result/conclusion】The social media users′ emotional experience in major emergencies is the result of the joint effect of sur⁃ face, transition and deep factors. Government response effectiveness, online rumor status, and moral binding force are the key factors affecting the emotional experience of social media users, which should be paid more attention to.【 Innovation/limitation】From the per⁃ spective of the user′s procedural experience, this paper analyzes the influence mechanism of public opinion information ecology on the user′s emotional experience. The next step will be to divide the specific properties of emotional experience in a fine-grained manner, and further measure and explore the intensity and direction of the influencing factors.