Abstract：【Objective】To investigate the efficacy of total hip arthroplasty（THA）on the treatment of traumatic arthritis that caused by internal fixation failures of intertrochanteric fractures.【Methods】During January 2009 and March 2016，35 cases of trau? matic arthritis（male：18 cases；female17 cases；49 ~ 86 years old，with an average age of 68.5 years）caused by internal fixation failures or malunion of intertrochanteric fractures，were undergo THA. Among 35 cases，13 cases were performed with the proximal femoral fixation stems，10 cases were with distal fixation stems，and 12 cases were with extended stems.【Results】With 3 ~ 65 months follow-up，the hip joint HSS score was elevated from 44.1（31 ~ 65）preoperative to 82.5（58 ~ 94）postoperative without obvious loosening. No postoperative deep infectionwas found. The femoral stems in 2 cases were found to sink 5 mm and 10 mm，respectively. No obvious prosthesis loosening was found. Taken together，the satisfaction rate of THA on the joint function of traumatic arthritis was 91.4%.【Conclusion】Total hip arthroplasty is recommended as an effective approach for treating traumatic arthritis caused by internal fixation failures of intertrochanteric fractures. Distal fixed prosthesis was recommended due to bone sclerosis or defects of proximal femur. Coupled with emphasis on reconstruction of the greater trochanter，good therapeutic effects could be achieved.