Abstract: Nano-titanium dioxide was prepared by sol-gel method.And the finishing agent containing nano-titanium dioxide was used as anti-ultraviolet finishing agent for cotton fabric by dip padding techniques.Scanning electron microscopy was used to observe the morphology of nano-titanium dioxide particles and the surfaces of untreated / treated cotton fabrics.The anti-ultraviolet property of the treated fabrics was tested.The results showed that the treated fabrics have excellent and durable UV protection properties,with UPF≥50.The UPF values increased with increase of the concentration of nano-titanium dioxide.And after home launderings,the UPF still maintained at a high level.Also,the whiteness and handle of the treated fabrics were kept(good.)