A systematic study was done on radiation graft-copolymerization of wool samples irradiated by γ-rays with methanol solution of methacrylic acid glycidyl ester monomer. It was found that reaction atmosphere did not cause great effects to the graft-copolymerization reaction. The graft rate increased with increasing dose, reaching a status of equilibrium at 11kGy. With increasing monomer concentrations, the graft rate increased, too, whereas the graft efficiency decreased. Results of IR and SEM characterizations of the grafted samples showed that monomer had been grafted uniformly onto the wool fibers.