In order to determine the change of temperature sensitivity of a No. 90th Road oil asphalt under different aging levels, and to evaluate the rheological mechanical properties of asphalt under different aging levels, by means of rheological performance indexes such as shear modulus, stiffness modulus and rutting factor, the change of rheological mechanical properties and asphalt applicability index of asphalt under different aging degree were obtained by using the surface temperature model of asphalt pavement by bending creep stiffness test (BBR) and rheological property test (DSR) method. The results show that the aging of asphalt will improve the sensitivity of asphalt rutting factor to temperature, the influence degree is about 52.87%, the aging of asphalt will reduce the sensitivity of asphalt bending creep stiffness to temperature, and the influence degree of short-term aging and pressure aging is 5% and 21%, respectively. The aging of asphalt makes the creep curve slope m of asphalt decrease by 8.21% on average.