Abstract: Risk communication is a key link in the transformation of public security governance model, and digital empowerment has been widely used in the process of risk communication. Will digital empowerment amplify the asymmetry of information transmission and acquisition in risk communication? How should the public security governance respond to this asymmetric amplification? Based on the data of epidemic risk prevention and control information transmission on three new media platforms, i.e., WeChat, Weibo and Tiktok, the paper uses Gephi software to draw the transmission map, and verifies the asymmetric amplification of risk information acquisition. It is found that the asymmetric amplification of risk communication of digital empowerment is on the premise of the asymmetry of risk information, which forms the asymmetric amplification effect of information transmission and acquisition through the catalysis of technical tools, individual choice and risk perception. In addition, the paper puts forward policy optimization suggestions on how to ensure information equity in terms of policy orientation, governance tools and diffusion paths.