Bamboo charcoal polyester fiber(BC-PET) has been widely applied in home textiles,functional clothing and hydra-balance material,due to their strong adsorptivity,good resolvability,anti-statics,deodorization,antibacterial,anion releasing and far infrared emitting.But BC-PET is black and difficult to be dyed,and its application is limited.In this article,nitric acid was used to treat the surface of bamboo charcoal(BC) powder,and BC powder was modified by titanium dioxide sol to prepare white bamboo charcoal(white-BC) particle.White bamboo charcoal polyester fiber(white-BC-PET) was obtained by mixing white-BC and polyester(PET) resin in double screw extruder.Performance of fiber was tested referring to national standard GB/T14464-2008 of common PET fiber and most of its indicators have already exceeded GB the level of excellent product.SEM photographs showed that the white-BC was uniformly distributed inside or on the surface of fiber.The white-BC-PET could absorb some aniline and had at least 90%anti-bacterial rate.The anti-bacterial rate could have almost been kept after it was washed 50 times.It was hopeful to be applied in various fields as functional fiber.