The effects of steel bar corrosion rate, water cement ratio, steel bar diameter and relative cover thickness on the bond properties between recycled concrete and corroded steel bar are analyzed and studied. The anti-slip stiffness and interfacial bond energy of Secant are selected as the degradation indexes of bond properties, and the degradation model of bond properties is established. In order to break the limitations of the existing research and provide theoretical guidance for the safe use and durability design of recycled concrete structures, and point out the shortcomings of the existing research. Finally, combined with the bond Anchorage reliability analysis, it is found that the Anchorage design length of recycled concrete is shorter than that of ordinary concrete.