Abstract: For better displaying bamboo fibrils′ UV protection factor(UPF) in worsted fabrics,this paper aims at new products development and tries to prove that the more the bamboo fiber content,the higher the UV reflectivity of the fabric,and the better the UPF through comparing the UPF of several bamboo/wool worsted fabrics with different contents of bamboo fiber;UV absorption is higher to the worsted fabric with 50% bamboo fibers,especially for UVC absorption,UPF of this fabric is increased.UV transmittance of fabrics mainly depends on its UV absorption rate,UVA,UVB transmittance is least for fabric with 20%,and fabric with 50% bamboo fiber screens UVC most.This has provided a basis for the application of bamboo fiber in worsted fabrics.