In order to systematically assess the modified effect of different modifiers to baseasphalt in performance index， we select five kinds of polymers(such as LDPE， SBS) and twokinds of nanometer materials as modifier， and put three amount of admixture into 70^#baseasphalt.Compared with the high and low temperature performance of modified asphalt andits temperature susceptibility and duct ibility， we assess the different modifier to the differentamount of admixture.The study shows that SBS have outstanding performance on modifiedeffects of base asphalt， the old LDPE is better than the new LDPE in comprehensive modi-fied effect， waste rubber powder can dramatically improve the low temperature perform-ance， SBR is able to improve the high and low temperature performance of base asphalt， asthe sametime， it also can dramatically improve the ductility， Nanometer ZnO and Nano me-terTiO₂ have the better performance on ductility(15℃) .The old SBS， waste rubber pow-der and SBR are more remarkable in comprehensive modified effect.