The invention discloses a resolving method based on a sound wave watermark. The resolving method comprises the following steps of a step S100, interpolating a sound wave watermark ID into an audio/video file by a sound wave watermark processing module; and a step S200, receiving the played audio/video file by the sound wave water mark processing module, and resolving the sound wave watermark ID. The resolving method has advantages of high identification rate, high interference resistance, real-time detecting performance. One or more program segment can be identified in one second. Furthermore simple system structure and wide application range.