An audio signal switching method and a device are provided. The audio signal switching method comprises the following steps: when an audio signal switches, performing weighting process on a first high-frequency band signal of a current frame audio signal and a second high-frequency band signal of former M frames audio signals, so as to obtain a processed first high-frequency band signal (101); synthesizing the processed first high-frequency band signal and a first low-frequency band signal of the current frame audio signal into a broad band signal (102).
