In order to study the influence of SBS content， stabilizer content and aging on the rheological properties and chemical properties of high viscosity SBS modified asphalt， dynamic shear flow was adopted for high viscosity SBS modified asphalt with different SBS content and stabilizer content. The rheological properties and chemical characteristics of modified asphalt before and after aging （short-term aging and long-term aging） were tested by the dynamic shear rheometer （DSR） and gel permeation chromatography （GPC） tests. The results show that the phase angle master curve can well characterize the changes in rheological properties of high viscosity SBS modified asphalt during aging； in high viscosity SBS modified asphalt due to extensive cross-linking， a large number of covalent bonds are formed in SBS Therefore， even after long-term aging， there are still enough covalent bonds to maintain the integrity of the SBS structure； compared with the SBS modified asphalt without stabilizers， the addition of stabilizers greatly improves the performance of the high viscosity SBS modified asphalt. But increasing the content of stabilizer if stabilizer is already contained the performance，then has only limited improvement high content of SBS modified asphalt requires a longer mixing time to make SBS fully swell and stabilize in the asphalt. The higher the content of the agent， the longer blending time is needed to make the cross-linking between the SBS molecules occur.