In this study, we used the treatment of argon plasma and polyacrylic acid to modify UHMWPE surface, and increased its surface wettability to make discussion of the dyeability by the basic dye in order to study dying fastness after treated with E-Beam. From the result showing in the same plasma power, the coating rate of UHMWPE treated with polyacrylic acid will be increased with the increased treat time; but in the same plasma treated time, coating rate is increased with increasing plasma power, but does not surpass 100W primarily, and when the plasma condition is 100W, 5 minutes, the coating rate is possible to reach 20.12%. The E-Beam processing can cause the UHMWPE and the polyacrylic acid cross-linked, so that the polyacrylic acid is not easy to fall off. It's the remarkable improvement to the dying fastness. This research found that the E-Beam dose 60KGy has the best wash fastness rating 4, and can improve xenon arc lightfastness rating reaches to 4-5.