In order to investigate the performance of European rock asphalt modified asphalt mixture，modified asphalt binder containing up to 20% of European rock asphalt was prepared.Design of AC-20C modified asphalt mixture with different percentages of rock asphalt was conducted.Performance tests were carried out on the specimens with optimum asphalt contents of respective percentages of rock asphalt.Based on the test results，the properties such as dynamic stability，Marshall stability，flow value，Marshall quotient，retained Marshall stability，indirect tensile strength ratio，flexural tensile strain，compression moduli at 15 ℃ and 20 ℃，and indirect tensile strength at 15 ℃ were analyzed.The analyses indicate that with the increasing percentage of rock asphalt，the high temperature stability and the moisture susceptibility of the modified asphalt mixture wer improved，and the stiffness and strength of the modified asphalt mixture increased.With the increasing percentage of rock asphalt，the low-temperature cracking resistance of the modified asphalt mixture increased to the peak value，and then fell down slightly.Considering the overall performance，the recommended optimum use of European rock asphalt in the modified asphalt binder ranged from 10% to 20%.