Research conclusions ： The revision trend of the normative gradation scope has proved that the S - shaped embedded crowed skeleton gradation has been generally accepted in a certain extent. To control the cost of bituminous mixture to the lowest level，the design of the bituminous mixture composition should fully consider the raw material cost，the production cost of the mixture materials, the construction cost and the later-stage maintenance cost. In the allowable circumstances, the coarse aggregates VMA should be designed as small as possible, and the overall clearance rate of the mixture materials should be adjusted by adjusting fine aggregate and filling material so as to optimize the performance of mixture materials.