The invention discloses an audio signal interruption detecting method. Enframing for audio signals is conducted, level peak-to-peak value of frames to be measured and a maximal frequency spectrum value are calculated, and the calculation result is compared with a preset threshold to accurately determine existence of interruption in an audio signal transmission process. Misjudgement can be reduced, and the problems of low accuracy, easy misjudgement and slow response speed of a conventional detection method can be overcome.