［Objective］This study aims to prepare coatings that combine high curing efficiencywith radiative cooling performance.［Methods］Using titanium dioxide（TiO₂）as the functional filler， the type and content of photoinitiator were optimized. The effects of TiO₂ crystal form，particle size，and addition amount on the UV-curing behavior and radiative cooling performance of the coating wereinvestigated through measurements of double bond conversion，gel content，and reflectance.［Results］ The polymerization rate of the coating system containing photoinitiator 819 was faster. Compared withanatase TiO₂，coatings incorporating rutile TiO₂ showed higher solar reflectance. Increasing the particle size and content of TiO₂ enhanced the solar reflectance of the coating but slightly reduced the finaldouble bond conversion. When the TiO₂ content was 30% and the coating thickness was 120 μm，the coating achieved a fast curing rate，with a reflectance of 84. 6% and an emissivity of 95. 0%. Themaximum daytime radiative cooling temperature difference reached 8. 7 ℃ under a solar irradiance of780 W/m² at an ambient temperature of 30 ℃.［Conclusion］By selecting an appropriate photoinitiator and optimizing the crystal form，particle size，and content of the filler，UV-curable radiative coolingcoatings with both high reflectivity and high curing efficiency can be successfully developed.