Abstract: The action mechanism of nano TiO2in the antibacterial and UVR(ultraviolet radiation) resistant finishing of textile and its application on pure cotton fabric were discussed.The results of testing indicated that the cotton fabrics after treatment can inhibit staphylococcus aureus and colibacillus 100% and white coccomycin > 90% after 30 launderings.The UV transmittance of both the dyed and undyed fabrics after treatment is 5%,reaching the minimum saturation degree.Nano TiO2can impart textiles good antibacterial and UVR resistant properties and has little effect on their serviceability.