Mesalazine, steroid, immunosuppressants and biologic agents are main medical treatments in treating inflammatory bowel diseases. Yet some patients develop severe side effects or initial invalid to conventional therapies. Some studies have already showed that tarcolimus and methotrexate are both effective in inducing and maintaining disease remission. Here we conduct a retrospective study to compare the efficancy of tarcolimus and methotrexate in treating refractory inflammatory bowel diseases as rescue therapy.