The present disclosure provides a breathing light adjustment method, an apparatus and an electronic device, a relation curve representing relationship between a visual brightness and an electrical signal of a breathing light is determined; the visual brightness interval is equally divided according to a brightness level limit, and an electrical signal value corresponding to each brightness level after the equally dividing is determined; a ratio between the electrical signal value corresponding to each brightness level and a maximum electrical signal value is determined; and a magnitude of the electrical signal value inputted into the breathing light is adjusted according to the ratio between the electrical signal value corresponding to each brightness level and the maximum electrical signal value, so that the brightness of the breathing light presents an effect of linear gradual change which suits human vision.