[Purposes] This work aims to demonstrate the semi-open graded asphalt mixture BK-7 with a nominal maximum particle size of 7 mm. [Methods] In this paper, the mineral composition formulation of BK-7 mixture was designed. The amount of SBS modified asphalt was determined by Schellenberg leakage test and Kantabaugh flying test when the fiber content was 0.4%. Uniaxial penetration test, low temperature bending test and Marshall stability test of BK-7 mixture with 9%, 11% and 13% porosity were carried out, and the corresponding properties of BK-7 mixture were compared with those of SMA-5, AC-5 and OGFC-5. At the same time, flying and Marshall tests were carried out on BK-7 mixture with 11% porosity soaked in acid solution. [Findings] Among the three kinds of BK-7 mixture, the BK-7 mixture with 9% porosity has the best road performance and the best rutting resistance, and its low temperature crack resistance and water stability are comparable to those of SMA-5 and AC-5 asphalt mixture. After soaking in acid rain solution with pH=4 for 2 cycles (" Soaking for 7 days, natural drying for 1 day "for 1 cycle), the Marshall stability of BK-7 mixture with 11% porosity and the flight loss of Fort Kenta could meet the corresponding specification requirements. [Conclusions] The road performance of BK-7 asphalt mixture with 9% porosity of SBS modified asphalt mixed with fiber has comparative advantages, and it has certain engineering application value in South China where exhibits a high-temperature climate throughout a year.