A multimedia audio dock is provided to support a portable electronic device so that the portable electronic device can stand on a plane. The multimedia audio dock includes two retractable arms formed by a plurality of sleeved-through tubes so that the length of the two retractable arms can be varied to a predetermined length. A biaxial hinge providing two rotational axes is connected to the two retractable arms, so that the two retractable arms may rotate relative to each other about two rotational axes. Two speakers provided respectively at the ends of the two retractable arms opposite to the ends connected to the biaxial hinge. The speakers receive the audio signals and output sound. And the electronic device is held between the two speakers moved by the two retractable arms, so that the portable electronic device can stand on the plane.