Abstract: A signal processing method and apparatus, and an electronic device are provided. The method includes: obtaining a first pulse wave signal and motion signals in multi-dimensional directions, where the first pulse wave signal includes motion noise; performing independent filtering processing on the motion signal in each dimensional direction, and determining a noise estimated value corresponding to each dimensional direction; and using the noise estimated values in the multi-dimensional directions as parallel input parameters, using the first pulse wave signal as an input parameter, and performing filtering processing on the first pulse wave signal, to obtain a second pulse wave signal.