Abstract:The dissipation energy method and phenomenological method are used to analyze the influence of the warm mix agent on the fatigue life of asphalt mixture. The result shows that the fatigue performance is better overall after the EV warm mix agent is added into the matrix asphalt mixture. The fatigue performance is poor overall after the RH warm mix agent is added into the matrix asphalt mixture. The fatigue performance is reduced at high strain level after the EV warm mix agent is added into the SBS modified asphalt mixture, but the fatigue performance is similar to that of the hot mix mixture.