Abstract: The widespread application of information and communication technology has had complex social impacts, the "risk amplification" effect of the dissemination of livelihood risk information through the internet may improve individuals' understanding of livelihood risk. Based on the data of China Family Panel Studies, this study constructed risk perception indicators of people's livelihood from social security, employment, education, health care, housing, environmental protection and wealth gap, OLS regression method, instrumental variable method and KHB mediation effect analysis were used to explore the correlation between public Internet use behavior and people's livelihood risk perception. The results show that the popularization of ICT has a profound impact on the transformation of public livelihood risk perception. Internet use behavior significantly enhances the individual's risk perception level of the people's livelihood. Mainly from the internet information channel effect, the reinforcement effect of internet on people's livelihood risk perception varies among different groups, which is more obvious in middle and high income and middle-aged and elderly groups, as well as in urban areas.