The invention discloses an infrared image super-resolution method based on edge sharpening. An infrared camera is used for obtaining an infrared image, an infrared super-resolution neural network structure is established, a network comprises an image processing sub-network and an image edge processing sub-network; for the infrared image input into the network, the image processing network is mainly used for recovering structure information of the image, and the edge processing network is used for recovering detail edge information of the image; the image processing network is divided into twostages; in the first stage, infrared image denoising and image structure information recovery are realized, and in the second stage, image super-resolution and more image detail structure informationrecovery are realized. Based on the requirement of digital infrared image super-resolution, high-magnification infrared image super-resolution is realized through respective processing of an image structure and edge information.