The embodiment of the invention relates to the wearable device technology field, and discloses a play control method of a wearable device and a wearable device. The method comprises: when a voice play demand is detected, starting bone conduction horn on the wearable device, determining a first audio signal of the bone conduction horn requiring playing voice, loading the first audio signal to a predetermined ultrasonic wave audio signals, and controlling the bone conduction horn to convert the ultrasonic wave audio signals loading the first audio signal to a first vibration signal and transmitting the first vibration signal through a bone medium. According to the embodiment of the invention, the play control method of the wearable device and the wearable device can reduce the risk that the voice is eavesdropped by people around and improve the users' convenience to listen to sound.