The fatigue life of cementstabilized macadam specimen beams was analyzed through coupling fracture and failure mechanics. The fracture toughness of specimen beams was calculated by finite element method(FEM). And the damage evolution equation controlled by tension stress was given, in which coefficients were backcalculated based on the fracture toughness control index using partial fatigue tests data. The life prediction precision of this equation was verified using residual fatigue tests data. It was shown that FEM is effective to calculate the fracture toughness of specimen beams. And the damage evolution equation based on the fracture toughness control index had better life prediction ability comparing with the SN equation. The proposed method can provide a calculation model to predict the service life of practical road structure.