Objective:To investigate the therapeutic effect of orthopedic trauma therapy device combined with URA lower limb rehabilitation trainer in patients who underwent total knee arthroplasty caused by traumatic fracture,and to analyze the effect of that on limb activity and quality of life.Methods:A total of 198 patients with end-stage knee osteoarthritis who were hospitalized in the hospital were randomly divided into a control group(69 cases,referred to as the control group),an orthopedic trauma therapy device group(63 cases,referred to as the therapy device group)and an orthopedic trauma therapy device combined with URA lower limb rehabilitation trainer group(66 cases,referred to as the combination group),and all patients underwent surgery of total knee arthroplasty.The American Knee Society Score(AKSS),Western Ontario and McMaster Universities Osteoarthritis Index(WOMAC)score,knee joint range of motion,quality of life,pain score and the evaluation of post-treatment satisfaction were observed and compared among the three groups.Results:The AKSS score and knee joint range of motion of the combination group were respectively higher than those of the control group after therapy,and the differences were significant(t=10.69,t=17.34,P<0.05).The WOMAC score of the combination group was significantly lower than that of the control group(t=26.98,P<0.05)after therapy,and the difference was statistically significant.The satisfaction of the combination group was significantly higher than that of the control group(t=9.93,P<0.05).The social function,physical function,role function and cognitive function of the quality of life in the combination group were significantly higher than those of control group(t=17.48,t=13.20,t=19.57,t=21.74,P<0.05),respectively.The pain score of the combination group was significantly lower than that of the control group(t=32.62,P<0.05),and the difference was statistically significant.Conclusion:The combination of orthopedic trauma therapy device combined with URA lower limb rehabilitation trainer has better clinical value in treating postoperative patients who undergo total knee arthroplasty in postoperatively fast rehabilitation and improving quality of life of them.