In this study, nylon and cotton fabrics could be modified by grafting acrylamide monomer upon the fabrics at dosages ranging from 0 to 100 kGy using electron beam. Grafting yields increased with increase of dosages, in which chemical strength between monomer and fabric was considerably strong. The grafted fabrics shown excellent properties such as washing-fastness, moisture absorbance, water regain, and dye-fastness. Moisture absorbability of grafted nylon was superior to cotton above 10% of grafting yield and dye-fastness for the EB-grafted nylon was higher by three times than for untreated nylon.