This paper mainly reports the γ-induced radiation grafting of diethylene glycol dimethacrylate (DEGDMA) and its mixture with ,β,-hydroxyethyl methacrylate (HEMA) in ethanol/water (1:1,W,/,W,) systems onto silicon rubber by direct method.,The results show that the grafting yield is increased with the radiation dose, and concentration of monomer and the concentration of transfer agent in systems.,When the concentration of cu,++, ions reached 0.075,N, a maximum graftion yield was observed.,At the same radiation dose, the degree of grafting decreased with the increase of dose rate. However, at the same dose rate, the grafting level increased with dose.,The water content in grafts increased with the concentration of hydrophilic HEMA in the mixture of monomers.,It is advantageous to increase the grafting level in ethanol/water (1:1 ,W,/,W,) by increasing the concentration of hydrophobic DEGDMA.