Abstract: After the occurrence of major natural disasters such as earthquakes, more and more people use the network to obtain and publish disaster information, express personal opinions and emotions, and so on, resulting in a tremendous amount of earthquake disaster network public opinion. Firstly, this paper reviews the related research on earthquake disaster network public opinion; secondly, based on the data of Sina Weibo, taking the Jiuzhaigou M7.0 earthquake in Sichuan Province in 2017 as an example, it analyses the characteristics of social people's emotional tendencies towards the earthquake event: 74.6% of the blogs show positive emotional tendencies; finally, through the content analysis of different emotional tendencies blogs, summarizes the main factors affecting the emotional fluctuation of netizens.