We describe the allograft technique and present its final results of revision total elbow arthroplasty (TEA) using a strut allograft in two cases that revealed prosthetic loosening and severe bone resorption after TEA. Two patients complained of pain and motion limitation, and had difficulty in hair combing and with hygiene. The preoperative Mayo elbow performance scores of both cases were 50 points and 45 points. They were followed up for 24 months and 18 months. There was no pain after surgery and the postoperative Mayo elbow performance scores were all 90 points. Radiographic bone unions were achieved 3 months after the operations and patients were satisfied with the results. The revision of TEA with a supporting allograft is a demanding procedure but can be tried when the elbow joint has badly destructed or has a large cavitary defect.