The mechanism and kinetics of the solid phase radiation graft copolymerization of N-methylolacrylamide (NMA) onto silk fabric have been studied, The results showed that the graft copolymerization ,may, take place in the solid mixture fo silk fabric and NMA dried by air blast at 50℃. The graft copolymerization consists of two parts, i. e. radical and ionic polymerization. Under the conditions of the dose rate I≥2.524 kGy/h, NMA content [M],<,17% and moisture [X]≤0.93% in the solid mixture, and at room temperature, the rate R,g, of solid phase graft copolymerization may be described as following equation,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42650119&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42650121&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42650120&type=