Abstract: The upgrading of new materials is a driving force of the spacecraft development, with the polyimides (named the golden film) as a good example. Polyimides are widely used in the area of the spacecraft, the aircraft, the energy system, the electronics, the automobile, the mechanical equipment and others. Based on the demands of the spacecraft environment for polyimde films, this paper focuses on the excellent properties of polyimides and real applications in spacecraft. Prospects and key points for applying polyimides to spacecraft are discussed in detail.