There is a popular opinion that SBS can improve both high and low temperature performance of base bitumen. In this study, four kinds of SBS are used to modify three kinds of common domestic bitumen and one kind of foreign one; some final products of SBS modified bitumen are obtained. The rheological properties of SBS modified bitumen after RTFO/PAV are studied by using bending beam Rheometer (BBR), which is one of the test methods of SHRP. The results indicate that the low temperature grade of SBS modified bitumen made by physical method is at the same level as that of base bitumen. In other words, the SBS modification effect on low temperature anti-cracking performance of base bitumen still deserves to study from the meaning of rheology.