The invention discloses a denoising processing method and device, a terminal and a storage medium. The method comprises the following steps: acquiring a to-be-processed noise signal, and determining whether a low-frequency signal exists in the noise signal or not; if the low-frequency signals exist in the noise signals, preprocessing the low-frequency signals, and generating reverse sound waves corresponding to the preprocessed low-frequency signals based on a preset active noise reduction processing module; and if the low-frequency signal does not exist in the noise signal, filtering the noise signal by using a preset attraction component. According to the embodiment of the invention, by identifying the noise signal frequency, the purpose of noise reduction is achieved by using two noisereduction modes, and the problems of poor noise reduction effect and low user experience caused by one noise reduction mode in the prior art are solved.