Abstract: This article discussed the modification of linen fabric by grafting acrylamide(AAm) onto it initiated by low temperature plasma for improving its dyeability.The quadratic regression orthogonal design was adopted to establish function expression among dye-uptake and concentration of acrylamide,temperature of graft polymerization,potential of plasma treatment,and time of plasma treatment.Individual function expression of each factor and dye-uptake was presented. The best process conditions were determined as follows: 30%acrylamide,14.6 kV plasma treatment for 60 s at(25 ℃).