For the most coastal areas where the air is very humid,study on the effect of humidity on the performance of asphalt has its practical significance.However,limited research has been done to investigate the effect of humidity on rheological properties of asphalt.In this study,asphalt binders were aged in the pressure aging vessel(PAV)under different conditions of moisture and aging time.Then Dynamic Shear Rheometer(DSR)and Bending Beam Rheometer(BBR)measurements were conducted to obtain the parameters relating to the complex modulus,phase angle,failure temperature,and creep stiffness.It was found that the low temperature performance decreased as evidenced by the results of the creep stiffness.While there were no significant differences among conditioned binders based on complex modulus G*and phase angleδ,it was found that theδvalue increased when the humidity increased from 0% to 80% ,and then theδvalue decreased when the humidity increased to 100% .In addition,the results of the failure temperature indicated that the humidity of 80% would be a critical point for the high temperature performance of the asphalt binders. For the most coastal areas where the air is very humid, study on the effect of humidity on the performance of asphalt has its practical significance. However, limited research has been done to investigate the effect of humidity on rheological properties of asphalt. In this study , asphalt binders were aged in the pressure aging vessel (PAV) under different conditions of moisture and aging time. Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) measurements were conducted to obtain the parameters relating to the complex modulus, phase angle, failure temperature, and creep stiffness. It was found that the low temperature performance decreased as evidenced by the results of the creep stiffness. Whilst there were no significant differences in conditioned binders based on complex modulus G * and phase angle δ, it was found that the delta value increased when the humidity increased from 0% to 80%, and then the delta value decreased when the humidity increased to 100% .In addition, the results of the fai lure temperature indicated that the humidity of 80% would be a critical point for the high temperature performance of the asphalt binders.