The invention discloses an identity authentication method. The method comprises the following steps: receiving an identity authentication request, performing voice reminding of a user to read and authenticate the voice content; acquiring a face video, performing face recognition authentication based on the face video; extracting voice data in the face video, obtaining a feature vector corresponding to the voice data based on a preset voiceprint model when face recognition authentication fails, performing voiceprint authentication based on the feature vector, and finally responding to an identity authentication request after the voiceprint authentication is passed. The invention further discloses a device, an authentication terminal and a readable storage medium. According to the method, onthe basis of face recognition, the voice data of the user are further acquired, and when face recognition authentication in the face video fails, voiceprint recognition can be continued to confirm that the user is a real user, so that the identity recognition efficiency is improved.