Abstract: The anionic surface active agent PAAS and Ti-acid-ester coupling agent were selected through comparative experiments as the combined dispersing agent which was applied to the dispersing treatment of(nano-ZnO,) rendering the dispersed (nano-ZnO) system good stability.The micro-structure of ZnO in the dispersed system was characterized by TEM.The physical properties such as whiteness and crease recovery angle of the fabric before and after treatment were tested.The results showed that the UV protection factor of the treated cotton fabric has a significant enhancement.And nano-ZnO particles will form a firm bonding with cotton and the fabric can be imparted a permanent anti-UV property when the compound crosslinking agent of chitosan and amino silicones is used in the treatment.