The present application relates to the field of alcohol detection, and particularly to an intelligent identity-authentication alcohol detector. One technical solution comprises an intelligent identity-authentication alcohol detector, comprising a base, a mounting seat, and a connecting arm; the mounting seat is provided on the base, and a face information acquiring module is provided on the mounting seat; the connecting arm is rotatably provided on the base, and a breathing opening for alcohol detection is provided on the connecting arm; and the connecting arm is used for driving the breathing opening for alcohol detection to a position where the face information acquiring module acquires the face information of a subject. According the technical solution of the present application, the face information acquiring module can constantly acquire the face information of a subject when the subject breathes into the breathing opening for alcohol detection, thereby preventing the subject from cheating.