Simple shear tests of steel wire rope-polymer mortar（SWR-PM）composite-to-concrete joint were conducted， and the influence of concrete strength， bonding length and compression depth at loading end on the failure models and debonding capacity was investigated. Test results show that failure modes include the interfacial debonding， concrete tension-shear failure， and a mixture of the first two failure models. With the increase of the bonding length， the debonding capacity increases first and then tends to be stable when the bond length is larger than the effective bonding length. The ultimate load of specimen tends to increase as the concrete strength increases. A model between the bonding length and the interfacial peeling capacity is proposed，the computed results matched well with the experimental ones.