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In order to improve the road performance of asphalt mixture in high altitude regions, different amounts of UV absorber(UV-531)/naphthenic oil(NPO) were selected for the composite modification of SBS asphalt. To investigate the effect of compound modifiers on the road performance of SBS modified as-phalt and mixtures. The results showed that the UV-531/NPO compound modifier significantly improved the low-temperature deformability and temperature-sensitive properties of SBS asphalt of SBS asphalt com-pared to the original SBS asphalt, but reduced the high-temperature performance of the asphalt(ductility increased by 117.6%, equivalent brittle point and temperature sensing coefficient decreased by 52.0% and 11.9%, equivalent softening point reduced by 2.3 °C). At the same time, the compound modifier can significantly improve the low-temperature crack resistance of the mixture (9.61% reduction in bending stiffness modulus and 11.20% increase in maximum bending and tensile strain). However, it will have a certain degree of negative impact on its high-temperature stability and water stability. High altitude regions mainly consider the low-temperature crack resistance of the mixture. Hence, UV-531/NPO Compound modified asphalt and its mixture have great potential for application. [ABSTRACT FROM AUTHOR]