Adding a warm mixing agent to asphalt can lower the working temperature of asphalt construction by 20–40 °C. It is difficult to evaluate the impact of the existing warm mixed agent on the quality and effect of asphalt due to its wide variety. In this study, 70 # asphalt and 3 kinds of surfactants were selected to prepare warm mix asphalt. The result of different warm mix agents on the rheological properties of asphalt was evaluated through a rheological experiment. The results explained that the warm mixing agent could lower the Brookfield viscosity of asphalt. With the increase in asphalt temperature, the viscosity difference of different types of asphalt binder becomes smaller and smaller. A warm mixing agent will also reduce the creep stiffness of asphalt. In the multiple stress creep recovery test, the average recovery rate of asphalt and the average value of irrecoverable creep compliance have obvious stress dependence.