Abstract: A download method for image file includes the steps of reading a header of an image file from an image file server; reading a start data block in a plurality of disk data blocks of a target disk; when the start data block has progress information, obtaining a current data block according to the progress information; downloading an image file data block corresponding to the current data block from the plurality of image file data blocks of the image file to the current data block; updating the progress information; when the current data block completing download is an end data block of the target disk, downloading an image file data block corresponding to the start data block to the start data block, and updating partition table information of the target disk; and repeating the above steps till all the image file data blocks are downloaded to the disk data blocks.