Abstract: Measuring and analyzing individual risk perception of artificial intelligence is the basis of studying its risk and social impact. In this study, a multi-index and multi-factor structural equation model (MIMIC) was constructed to measure youth's risk perception level of artificial intelligence from four aspects, and the impact of eight risk factors on it was investigated. The results show that youth's evaluation of social, ethical, legal, national security, political and other risk factors positively enhances their risk perception of artificial intelligence, while the evaluation of economic, technological, personal and property factors has no significant impact. Compared with other factors, concerns about ethics, national security and law significantly increase the risk perception of AI among young people. It shows that the contemporary youth's risk perception of artificial intelligence is mainly characterized by "Foresight" rather than "Short-Term Concern", which shows that the youth group has a deep sense of worry about the overall, long-term and legal aspects of technology. In view of these measurement and analysis results, it is suggested that in the process of comprehensively developing AI risk governance, more efforts should be made to strengthen the governance of AI hidden risks from the perspective of national strategy and legal ethics, so as to eliminate people's concerns to the greatest extent and consolidate the social foundation for the implementation of emerging technologies.