To investigate the road performance of high modulus asphalt mixtures（HMAM）in long-life pavement applications, high boiling point petroleum is incorporated into base asphalt to prepare high modulus asphalt binder（HMAB）．Penetration, softening point, brittleness point, and dynamic modulus tests are conducted to evaluate HMAB' s hardness, high-temperature stability, low-temperature crack resistance, and dynamic load response characteristics, demonstrating its modulus enhancement and performance advantages over conventional binders．Furthermore, dynamic modulus, moisture susceptibility, rutting resistance, and fatigue tests are performed on HMAM to assess its structural stiffness, moisture resistance, high-temperature rutting resistance, and durability, confirming its suitability for long-life pavement compared to conventional mixtures．Results indicate that HMAB exhibits significantly higher stiffness than conventional asphalt while maintaining comparable low-temperature performance．Under high-temperature conditions, HMAM demonstrates a 50% higher dynamic modulus, approximately 10% improvement in moisture resistance, twice the resistance to permanent deformation, and 5～10 times greater fatigue cracking resistance compared to conventional mixtures．