Abstract: In order to improve the dyeing behavor of wool fabrics, surface modification of wool fabrics was carried out by CF4 low-temperature plasma treatment. The changes in the morphology, microstructures and physical and chemical properties such as wettability, thermal stability and dyeability of the treated fabrics were investigated by using SEM, FTIR-ATR and TGA analysis. The results showed that the treated wool fabrics exhibited changed morpholgy and chemical properties, improved thermal stability and dyeability. Even short duration of this plasma treatment can improve the wettability of the fabrics. Increasing the time of treatment can graft F-contained groups(C-F) onto the surface of the fabrics and impart them good water- and oil repellent properties.