Abstract: The high reflection film of large aperture mirror is an important optical element in the optical system of large aperture space camera. In order to observe more targets and obtain more earth and space observation information, higher requirements were put forward for the retro reflective film of large aperture space camera. It was necessary to have a wider working spectrum and higher reflectivity toimprove the optical performance of the substrate and to reduce the influence of space environment on the performance of the high reflection film and the stress of the film. In this paper, the achievements in the research of high reflective film for large aperture space camera mirrors at home and abroad in recent years were reviewed. The review shows that, although there are still many difficulties in the design and manufacture of high reflection film, with the deepening of research and the proposal of new methods, the solutions to these difficulties have been basically found.