The invention relates to the technical field of image processing, and provides a document image denoising method based on seal recognition, a server and a storage medium. The method comprises the following steps: receiving a document image denoising request sent by a client, obtaining a preset number of document images from a preset database, marking the seal area of the document image by using apreset marking rule and generating a training sample set, inputting the training sample set into an SSD model for training; obtaining seal recognition model, and inputting the original document imageinto a seal identification model, identifying a seal area of the original document image, denoising the original document image, identifying a noisy point area except the seal area in the original document image, filling the noisy point area with a preset color to obtain a target document image, and feeding back the target document image to the client. By utilizing the method and the device, the seal area in the original document is identified, so that the seal of the image is prevented from being identified as noise in the denoising process of the document image.