Dynamic modulus tests were conducted on three asphalt mixtures under different loading modes. The effects of loading mode, confining pressure and strain level on the master curve of dynamic modulus were studied. The functions of shift factor confining pressure and dynamic modulus confining pressure for asphalt mixtures were developed using Fillers Moonan Tschoegl model and improved Sigmoidal model, respectively. It is found that twice fitting can eliminate the dependency of dynamic modulus extreme in the master curve on shift factor model. The uniaxial compressive, indirect tensile and four point bending dynamic modulus values of asphalt mixtures are different at the same reduced frequency, especially at low temperatures or high loading frequencies.However, there are nice linear correlations between them. The confining pressure has significant effect on triaxial compressive dynamic modulus at high temperatures or low loading frequencies. The four point bending dynamic modulus is sensitive to the change of strain level.