Based on current researches at home and abroad, the rheological properties of nano-graphene modified asphalt were studied through Brinell viscosity, dynamic shear rheological test (DSRs) and low temperature bend- ing beam rheological test (BBR). The research results show that graphene can obviously increase the viscosity of asphalt and improve its resistance to permanent deformation at high temperature, but it may have a negative ef- fect on the performance at low temperature.