Audio output device and automobile

The invention discloses an audio output device and an automobile. The audio output device comprises an auxiliary AUX interface, an audio signal processing chip, a charging circuit, a mode switching chip, a mode selecting button and a connection line. The connection line, the auxiliary AUX interface, the audio signal processing chip, the mode switching chip and the mode selecting button are sequentially connected, and the charging circuit and the audio signal processing chip are connected in parallel. When the mode selecting button is in an audio mode, the mode switching chip outputs a high electric level to the audio signal processing chip, and branch circuits of the audio signal processing chip is switched on. When the mode selecting button is in a charging module, the mode switching chip outputs a low electric level to the charging circuit, and branches of the charging circuit is switched on. According to the audio output device and the automobile, a gate circuit of the mode switching chip is changed through states of the mode selecting button, so that multimedia information of a terminal device is transmitted to automobile stereo equipment for playing through the auxiliary AUX interface, and the mobile terminal can also be charged.