The work aims to study the process, the thermal properties and the space electron proton radiation resistance of domestic double-sided aluminized polyester films. In order to obtain the high quality and excellent performance of aluminized polyester film, the forming process research of aluminized polyester film was carried out. The difficulties of aluminized polyester film forming process were analyzed and the coating process was improved. The properties of space electron and proton irradiation resistance of domestic and imported aluminized polyester films were compared through the test on the thickness, adhesion, solar absorption and hemispherical emissivity of double-sided aluminized polyester film. The vacuum coating process for industrial production was adopted to treat the polyester film substrate by improving the purity of the target and vacuum, and reduce the film temperature in the coating to prepare ultra-thin double-sided aluminized polyester films. The solar absorption ratio was 0.09 and hemispherical emissivity was 0.04 in conformity with the standard value of imported polyester films. Under the electrons irradiation of 2′1016 e/cm2 and proton irradiation dose of 1.5′1015 p/cm2, the solar absorptance film was reduced from 0.115 to 0.144, and the hemisphere emissivity was reduced from 0.033 to 0.037. double-sided aluminized polyester films with excellent properties and heat resistance of space electron-proton irradiation performance can be prepared by improving the production process. The thermal property data of domestic aluminized polyester film are enriched further to provide experimental basis for the use of the ultra-thin double-sided aluminized polyester film on spacecraft.