In order to make sure the rule of the dynamic modulus of the commonly used AC-20 mixture for asphalt concrete pavement, the same material sources of coarse aggregate, fine aggregate and mineral filler are mixed. Marshall test method is used to determine the optimum asphalt content of lake asphalt and SBS modified asphalt and 70 ^# asphalt mixture. Uniaxial compression test method by simple performance test instrument is used to test the dynamic modulus. Based on the application of time-temperature equivalent principle, Arrhenius equation parameters is fitted by NCHRP09-29 Mastersolver Version 2.2,and set up three kinds of dynamic modulus master curve of asphalt mixture at 20 ℃. The results show that dynamic modulus master curve of the lake asphalt modified asphalt and SBS modified asphalt AC-20 are always located above the base asphalt AC-20, and the asphalt modifier to the mixture performance is improved significantly. Lake asphalt modified asphalt and SBS modified asphalt AC-20 dynamic modulus master curve have approximation, crossover phenomenon, and show that different modified asphalt mixture performance have the different scope of application.