The surface organic modification of rutile nano-TiO2 with n-ctyltriethoxysilane（LM-N308）by the phase transfer method was studiedThe asprepared samples were characterized with Fourier transform infrared spectra（FTIR），thermogravimetry（TG），differential thermal analysis（DTA），X-ray photoelectron spectroscopy（XPS），high resolution transmission electron microscopy（HRTEM）and the degree of oilaffinity experiment，respectivelyAccording to the spectra of FTIR and XPS，it was inferred that the LM-N308 was bound on the surface of nano-TiO2 particlesHRTEM results showed that an even coating layer of LM-N308 on nano-TiO2 surface was formed，and the thickness of the coating layer was about 2 nmData from TG and oilaffinity experiment indicated that the saturated mass fraction of chemisorptive LM-N308 on nano-TiO2 surface was 7.0%—9.7%The dispersivity experiment revealed that the surface property of nanoTiO2 modified with LM-N308 was changed from hydrophilicity to hydrophobicity.