Beijing Institute of Space Mechanics & Electricity， Beijing 100076
The matching of temperature resistance，mechanical properties and the survivability of space environment of materials， and the forming process of parts are studied towards the performance requirements of the cylinder cover of brake parachute on Tianwen-1 Mars mission lander， which is supposed to withstand temperature changes， irradiation and other space environments during the on-orbit operation， and to withstand the temperature shock resistance during the reentry process. The results show that the specimens prepared by using adhesive J-168-1， adhesive J-245 and T300/QY8911 composite materials passed the performance tests， and meet the design index requirements of the cylinder cover structure. The mechanical properties of cylinder cover product is stable， as well as the molding process feasibility. The instantaneous service temperature could reach 200 ℃， and the mechanical properties are maintained above 80% after the space environment simulation，showing that the high temperature resistance and space environment resistance are good. The product of cylinder cover has been successfully launched into space， and successfully ejected and separated when the parachute deployed.