Ultraviolet ray in sunlight not only makes textiles fading and stiffly fragile, but also damages the skin and produces melanin and fleck. W hat is more, it can cancer and health problems can occur. Important attention has been paid to the irradiation injury at home and abroad. The domestic anti-UV standard has been established as well. The fabrics treated by anti-UV finish can effectively screen UV radiation and absorb the UV ray in the band of 180-400nm especially UV-A and UV-B. The UPF of the fabric is more than after 50 even 40 washes. In addition, the fabric is safe to people, no stimulating, no allergic reaction, and no diminishing to its colour, strength and moisture peimeation.