Powdered styrene butadiene rubber is widely used as road asphalt modifier, asphalt extender, high viscosity asphalt, hydraulic asphalt, rubber products. The powdered SBR improved by grafting has more special energy efficiency, not only has excellent low temperature resistance, but also has excellent high and low temperature performance and elastic recovery ability. Products in the road performance has a high high temperature deformation resistance, low temperature cracking ability, resistance to water damage, and maintain good adhesion and deformation with the road surface adaptability, in the elastic recovery performance is very good.