In order to develop the lightweight asphalt concrete,a light high-modulus asphalt mixture was prepared by using mixed macadam of light shale and basalt.By 3h rutting test,low-temperature beam bending test,immersion Marshall and freeze-thaw splitting test,the influence law of light shale macadam on the pavement performance of asphalt mixture was studied.The dynamic modulus and fatigue property of the mixture with 40% volume substitution rate of light aggregate were experimentally studied.The results show that with the increase of the proportion of light shale macadam,the change of high temperature stability and water stability of light high-modulus asphalt mixture is not obvious,while the low temperature bending performance increases first and then decreases with the increase of light aggregate content;when the content of light shale macadam is 20%,the pavement performance of asphalt mixture is the best.The dynamic modulus of the asphalt mixture with 40% volume substitution rate of light aggregate increases by 12.4% under the condition of 15℃,10 Hz;the dynamic modulus and fatigue life increase by 38.1% and 14.2% under the condition of 45℃,10 Hz,respectively.Therefore,mixing 40% volume substitution rate of shale into the asphalt mixture not only can obtain excellent pavement performance,save high- quality basalt resources,but also is beneficial to protect mountain-forest resources,promote the aim of the road industry's "carbon peak, carbon neutralization" to realize.