The radiation crosslinking of polyamide 1010 (PA 10l0)were studied. In irradiating PA 1010 at room temperature under vacuum and air with ,60,Coγ-rays, crosslinking takes place mainly and degradation occurs simultaneously. The radiation obeys Charlesby-Pinner eqation. The dose for incipient gel formation are 25 Mrads and 29 Mrads in vacuum and air respectively. The influence of oxygen is observed. The crosslinking of PA 1010 can be accelerated by MI. Heat treatments of postirradiated PA 1010 cause increasing the gel contents of PA 1010. ESR study indicates the increase of gel content is closely related to the recombination of the radicals trapped in PA 1010. Heat of fusion and crystallization temperature of PA 1010 determined by DSC are changed with radiation dose. The crosslinking of PA 1010 can be characterized by crystallization temperature. Electrical property and thermal resistence of PA 1010 are improved by radiation crosslinking.