Under ,γ, irradiation of aqueous solution of cyanide ion the effect of sulphite on the formation of glycine and other main products has been investigated.The experimental results show that the formation of cyanate and formamide arises from OH radical. The yield of glycine increases with the increaseing of the Na,2, SO,3, concentration, which reveals the fact that the formation of glycine is related to the recombination of H,2, CN or HCN,-, free radicals. The value, ΔG(glycine)≈0.93.,The kinetic calculation has been performed. The results not only demonstrate that the following reactions take place in the system saturated with nitrogen,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648124&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648126&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648125&type=,but also show that glycine can be formed by recombination of the diffused H,2,CN (or HCN,-,) radicals. The value of ,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648129&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648151&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648135&type=, has been evaluated. ,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648152&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648140&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42648154&type=, is equal to (8.3± 0.3)×10,9, M,-1,S,-1,.,Alanine has been proved to be one of the radiolytic products under ,γ, irradiation of KCN aqueous solution. The yield of alanine is almost independent of the presence of the scavenger, therefore it may be produced in spur.