Abstract: An audio system data synchronization method and an audio component are provided. The method includes: the first device receiving in an n-th cycle an audio data packet sent by the audio data source and judging whether receiving is successful; the second device receiving in the n-th cycle the audio data packet and judging whether receiving is successful; if the receiving of the first device and/or the second device is failed, one of the first and second devices whose receiving is failed sending a first special acknowledge packet in the n-th cycle; after receiving the NAK packet, making the audio data source re-send the audio data packet in an n+1-th cycle; and after receiving the first additional field, making the other device stop sending a signal in the n-th cycle, and receive, in synchronization with the device whose receiving is failed, in the n+1-th cycle the re-sent audio data packet.