Nanoparticles have been increasingly used to improve the properties of polymer materials. In this study, SiO2 nanoparticles were added to starch for sizing applications in the textile industry. The effects of the content of SiO2 nanoparticles on the abrasion properties of the starch film were measured using a wear tester. The wearing surfaces were observed with Scanning Electronic Microscope, an Atom Force Microscope and a High Magnification Optical Microscope in order to better understand the wearing mechanism. The results showed that the best wear resistance was achieved when the content of SiO2 nanoparticles was about 3%. The wear resistance mechanism of starch film containing SiO2 nanoparticles was analysed