Abstract: To investigate the effect of grouting sleeve corrosion on the interfacial bonding performance between concrete and sleeve, this study firstly conducted pull-off tensile tests on grouting sleeve connectors with various sleeve diameters (42 mm, 52 mm, and 58 mm) under various rust degrees (0%, 1%, 2%, 3%, 4%, 6%, and 8%). The changes in the failure mode, in the load-displacement curve, in the bond-slip curve, and in the interface fracture energy were studied. The bond-slip constitutive model considering various rust degrees was derived by the experimental results, and it was verified by establishing corresponding finite element models. The results show that as the rust rate increases, the failure mode of grouting sleeve specimen changes from reinforcement pull-out failure to concrete splitting failure. The interface energy consumption under 8% rust rate is decreased by 89.45%-92.67%, compared to the non-rust specimens. The maximum error of the constitutive relationship model constructed reaches 8.03% through the experiment and simulation verification. This indicates that the constitutive model proposed can accurately simulate the deteriorating bonding properties of concrete-sleeve interface under rust conditions, thusly providing a technical support for the establishment of accurate numerical model of assembled bridge pier structures.