According to the existing research situation and shortage of crumb tire rubber powder and SBS composite modified asphalt, take China National Offshore Oil Corporation 70 # asphalt as the matrix asphalt, adopt with crumb tire rubber powder and SBS as modifier, through the low temperature ductility, penetration, softening point, elastic recovery and DSR dynamic shear test to determine the crumb tire rubber powder and SBS reasonable dosage, through the economic efficiency analysis, determined the social and economic value of composite modified...