The invention provides an image wavelet denoising method based on median filtering, which belongs to the field of digital remote sensing image processing. In the method, median pre-filtering is firstly performed on images containing noise, wavelet conversion, threshold value treatment and denoising treatment are then carried out, wavelet reverse conversion is finally carried out, and filtered images are output. The invention has the advantages that the median filtering method is used for the pre-filtering of images containing noise, much noise of pepper salt type is removed, and influence on the high-frequency part of images is avoided; the wavelet threshold value method is then combined with the denoising method of the relativity of wavelet coefficient size, and the mixture of signal coefficient and noise coefficient caused by using the wavelet threshold value method singly is avoided; and meanwhile, a large amount of computation required by using the denoising method of the relativity of wavelet coefficient size singly is reduced. The experiments prove that the method has stable denoising effect and moderate computation amount.