Harmonic filtering method and device, terminal and storage medium

The embodiment of the invention discloses a harmonic filtering method and device, a terminal and a storage medium, and belongs to the technical field of signal processing. In the embodiment of the invention, the terminal firstly determines the first frequency band and modulates the filter connected with the signal path of the frequency band to the frequency characteristic according to the first frequency band, the modulated filter can filter the signal corresponding to the first frequency band, and finally the filtered signal corresponding to the first frequency band is transmitted out. The filter provided by the invention is a programmable filter, and the frequency characteristic can be changed according to parameter adjustment in the filter. Therefore, when the at least two candidate frequency bands are filtered by the filter, the embodiment of the invention can adjust the filter through the actually used frequency band, so that one filter can adapt to the filtering of the plurality of candidate frequency b