The invention discloses an image hiding method based on deep learning. The image hiding method specifically comprises the following operation steps: S1, importing a target hidden image a and a carrierimage A serving as a carrier of the target hidden image a; S2, segmenting the target hidden image a and the carrier image A according to the same pixel size; S3, collecting characteristic parametersof the image blocks am and the image blocks Am; S4, performing deep learning, and performing cross comparison on data in the block a database and the block A database; and S5, replacing the image block Am with the closest parameter by using the image block am, recombining all the recombined image blocks Am to form an image, and outputting the image. According to the image hiding method, the imageblocks of the carrier image are replaced by the image blocks of the target hidden image, and the image blocks of the target hidden image have relatively high dispersity, and finally the image blocks of the carrier image containing the image blocks of the target hidden image are recombined, so that the target hidden image is dispersed in the carrier image in the form of tiny image blocks, is difficult to discover and has stronger confidentiality.