The Hyperspectral infrared imaging technique is an optical detection technology which integrates spectral measurement technology and infrared imaging technology. It can not only obtain the spectral information of the target, but also obtain the image information, which provides a powerful guarantee for the accurate recognition of the target. Due to the spectral characteristics of the mid-wave infrared, mid-infrared hyperspectral imaging system is widely used in civilian and military areas, such as geographical remote sensing, target detection and thermal fluent analysis. With the development of related technologies, imaging spectroscopy technology has diversified. In this paper, the push-type mid-wave infrared reflection planar grating hyperspectral imaging system is selected as the design target. The system consists of: front optical system, slit, collimation system, grating spectroscopic system, imaging optical system, imaging electrical component and control module.