Abstract: In this study,the organosilicon containing different functional groups was used for surface modification of titanium pigment coated with zirconia and alumina,to investigate the effects of organosilicon on the thermal stability of titanium dioxide by analyzing the whiteness variation of titanium pigment after preservation at the high temperature.Meanwhile,the influences of organosilicon on the pigment and application performances of titanium dioxide were also studied.The results show that the organosilicon with different functional groups corresponds to various pigmental properties such as thermal stability and oil absorption,and multifarious application performances like dispersion and covering power of the pigment.Nevertheless,the different types of organosilicon illustrate little influence on the whiteness and brightness of titanium pigment.