The present application discloses an audio-video synchronization processing method and a display device. The display device includes a first chip and a second chip, the first chip is provided with a first video processor, a first audio processor and a controller, and the second chip is provided with a The second video processor and the second audio processor; the second video processor obtains the time-consuming processing of the second image quality, and the second audio processor obtains the time-consuming processing of the second sound; the first video processor obtains the first image quality processing Time-consuming; the first audio processor obtains the first sound processing time; the controller calculates according to the first image quality processing time, the second image quality processing time, the first sound processing time, and the second sound processing time Audio-video synchronization time difference, judging whether the audio-video synchronization time difference is within the threshold range, if not, performing synchronous compensation for the video signal and audio signal output by the second chip. This application can realize the synchronization of sound and picture, thereby improving the video playback effect of the display device, especially this solution can be applied to social TV.