The mechanics property near interface crack tip is studied in order to strength analysis, which interface is between GFRP and asphalt mixtures. Bimaterial Brazilian Disk specimens with prefabricated interface crack are designed. 27 Brazilian Disk specimens are tested by loading angle in the range of 25 degree to 90 degree, and experimental data are recorded, such as ultimate load, crack propagation path, fracture form, etc. Finite element model of GFRP asphalt mixtures Brazilian Disk is built, considering the GFRP orthotropic property. Interface stress intensity factors (SIF) are calculated applying numerical extrapolation method, and fracture mechanics performance of GFRP asphalt mixtures Brazilian Disk is studied by theoretical analysis and experimental research. The results show that the bimaterial Brazilian Disk specimens with prefabricated interface crack can fully reflect fracture types of GFRP and asphalt mixtures, which is an efficient experiment method, that interface SIF acting as mechanics evaluation parameter, can well explain experiment phenomena, and that GFRP and asphalt mixtures Brazilian Disk specimens with prefabricated interface crack are in accordance with elliptic strength criterion.