In order to improve the performance of rutile titanium dioxide（TiO₂）in polyester resin coatings，a three-layer structure was constructed on the TiO₂ surface by wet coating method to prepare the modified TiO₂（P-Zr-Al/TiO₂）. XRF and TEM were used to characterize the structure and properties of modified TiO₂，and the pigment properties of the powder weretested to evaluate its wrapping effect. The results showed that the rutile TiO₂ modified byzirconium-sulfuric acid coating process using sodium hexametaphosphate as phosphorus coating agent had good optical properties，with L* value of 98. 89，hiding rate of 85. 52%，and oil absorption of 17. 5 g/100 g. After exposure to the simulated environment of sunlight andrain for 240 h，the light loss rate of polyester resin coating was 47. 3% and the ΔE was 0. 84.