The sand thickness degree namely fineness modulus Mx of fine aggregate has some effect on various performance of concrete. The initial fine aggregate is sieved into four different kinds of sand as 2.11、2.64、3.15、3.6. By keeping the basic mix proportion unchanged, four kinds of pavement concrete are made up with these four kinds of sand，and through a lot of experiments, the workability, compressive strength, flexural strength, frost resistance，impermeability and wearing resistance of these four kinds of pavement concrete are systematically studied, the influence rules of sand fineness modules on the performance of pavement concrete are found, the fineness modules range of the sand suitable for airport pavement concrete is defined. The results show that the optimal range of fineness modules of fine aggregate is synthetically considered and determined as 2.64 or so. If the fineness modulus is over this basic range, the strength, frost resistance and impermeability will decrease rapidly, if less than that range, the wearing resistance will decrease rapidly.