Abstract: The chemical bonds of organic molecules could be ruptured by ionization radiation-induced reaction. New product of function polymer with high performances could be fabricated by radiation process techniques. Now days, the γ-ray radiation techniques has been widely used in polymerization and modification of materials. In this study, the radiation vulcanized hydrogenated nitrile butadiene rubber (RV-HNBR) was prepared by γ-ray radiation. The radiation effects with different absorbed dose on mircomorphology, mechanical properties, thermal stability and resistance of hot oil and air aging of HNBR was studied. The fracture surface of HNBR was observed by SEM. With the absorbed dose increasing, the fracture surface became more and more smooth. The significant enhanced mechanical properties was discovered in the RV-HNBR. The volumetric change rate of RV-HNBR-160 was 18.3%, which was smaller than that of chemical heat vulcanized HNBR after immersed in 903# at 150 ℃ for 70 h. Furthermore, RV-HNBR exhibited excellent hot oil and air aging resistance. The retention rate of tensile strength and elongation at break was increased with absorbed dose increasing. The results could be attributed the vulcanized cross-linked cructure which was formed by C—C bonds among HNBR chains. The RV-HNBR with high recovery in this study are promising application as one of sealing functional materials.