Abstract: The dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were utilized to test three asphalt(asphalt, styrene-butadiene-styene blockcopolymer(SBS)modified asphalt, rubber powder modified asphalt) before and after freeze-thaw cycles. The variation orderliness of high and low temperature performance of three asphalt under different freezing temperature and the concentration of snow melting salt and the cycle times of freeze-thaw were compared. Then the environment factors by grey correlation entropy were analyzed. The result shows that the most important factor on the complex modulus of asphalt (G^*) is the concentration of snow melting salt, followed by 10℃ ductility.The factor which has the greatest impact on phase angle of asphalt (δ) is softening point, followed by 25℃ penetration. And the biggest influencing factor on the creep stiffness modulus of asphalt(S) is the concentration of snow melting salt, followed by 10℃ ductility. The factor which have the greatest impact on creep rate of asphalt (m) is test temperature, followed by freezing temperature.