The adhesion of CFRP(carbon fiber reinforced polymer) to high strength concrete subjected to different sustained loads and freeze thaw cycles was studied with double lab shear tests. The results indicate that each factor has adverse effects on the bond properties:freeze thaw cycles significantly decrease ultimate loads and ultimate slips, sustained loads reduce the stiffness. Their combination causes a further deterioration of bond properties and increases the effective bond length. In addition, failure mode turns into the shear failure of surface concrete, instead of the one between adhesive and concrete, illustrating that the degeneration of concrete caused by sustained loads and freeze thaw cycles is the major reason of the reduction of interface adhesion.