Cement stabilized macadam is the most commonly used material for pavement base. Basalt fiber can enhance the mechanical properties of cement stabilized macadam to different extents. In view of the content of fine aggregate below 4.75 mm is large in cement stabilized macadam with suspended dense structure, the effects of length and content of basalt fiber on the compressive strength and rupture strength of cement stabilized fine aggregate were studied firstly. Based on this, the overall mechanical properties of cement stabilized macadam with basalt fiber and ordinary cement stabilized macadam were compared. The results indicate that the compressive strength and rupture strength of cement stabilized fine aggregate reach highest when the content of fiber with different lengths is 1.2‰ (mass fraction). The fiber content of 1.2‰ in cement stabilized fine aggregate is equivalent to the fiber content of 0.48‰ in cement stabilized macadam. After mixing the fiber of different lengths at content of 0.48‰ into the cement stabilized macadam, it is found that the cement stabilized macadam with 12 mm fiber shows higher unconfined compressive strength and splitting strength. The 28 d unconfined compressive strength, 7 d splitting strength and 14 d flexural-tensile strength of cement stabilized macadam with suspended dense structure increase respectively by 23.4%, 34.2% and 34.1% at the fiber length of 12 mm and content of 0.48‰. In addition, basalt fiber reduces the compressive resilience modulus of cement stabilized macadam, and the reduction rate reaches 22.1% at 14 d.