[目的/意义]探究微信用户发布突发自然灾害事件相关信息的影响因素，以提高微信用户相关信息交互体验，为相关部门有效引导舆情、化解危机提供理论参考。[方法/过程]基于使用与满足理论构建微信用户突发自然灾害信息发布行为影响因素初始模型，以“7.20河南暴雨”灾害事件为例，通过问卷调查搜集数据，利用SPSS26和SPSSAU对初始模型进行检验并建立回归方程，对比分析了用户微信朋友圈和微信群突发自然灾害相关信息发布行为影响因素的异同。[结果/结论]研究表明无论是在朋友圈还是微信群，情感需求都对用户自然灾害信息发布行为产生显著的负向影响；舒解压力需求都对用户自然灾害信息发布行为产生显著的正向影响，而社会整合需求不会对用户朋友圈自然灾害信息发布行为产生影响，个人整合需求不会对用户微信群自然灾害信息发布行为产生影响。

[Purpose/Significance] The purpose of this article is to explore the influencing factors of WeChat users to publish information related to sudden natural disaster events, to improve the interactive experience of WeChat users' relevant information and provide theoretical references for relevant departments to effectively guide public opinion and resolve crises. [Method/Process] Based on the use and satisfaction theory, this paper constructed the initial model of influencing factors of WeChat users' sudden natural disaster information releasing behaviors. Taking the "7.20 Henan rainstorm" disaster event as an example, the data was collected through questionnaire survey, the initial model was tested by SPSS26 and SPSSAU, and the regression equation was established. This paper compared and analyzed the similarities and differences of influencing factors of information releasing behaviors related to sudden natural disasters between the WeChat moments and WeChat groups. [Result/Conclusion] The research shows that whether in the WeChat moments or WeChat group, emotional needs have a significant negative impact on users’ natural disaster information releasing behaviors; relief pressure demands have a significant positive impact on users’ natural disaster information releasing behaviors; while social integration demands do not have an impact on users' information releasing behaviors about natural disasters in the WeChat moments, and personal integration needs do not have an impact on users' information releasing behaviors about natural disasters in WeChat groups.