Objective: To evaluate the clinical efficacy of proximal femoral nail antirotation (PFNA) in treatment of elderly incompleted inner wall type intertrochanteric fracture. Methods:The medical records of 33 patients with incompleted inner wall type intertrochanteric fractures were analyzed retrospectively. The incision length,blood loss,operative time,volume of drainage,start standing time,fracture healing time,abnormal rate of femur and complications were summarized,and the clinical effects were also evaluated according to Harris standard. Results:A total of 31 patients achieved complete follow-up data. The fracture healing time and clinical excellent rates were (12.5 ± 3.5) weeks and 90.3%. The abnormal rate of femur operative time, incision length, blood loss, operative time, volume of drainage, and start standing time were 12.9%,(4.3 ± 2.7) cm,(50.2 ± 35.0) ml,(40.3 ± 12.7) min,(30.5 ± 9.6) ml and (10.3 ± 5.7) d. Conclusion:PFNA fixation is an ideal method for treatment of elderly incompleted inner wall type intertrochanteric fractures, with small incision, shorter operative time, shorter fracture healing time, shorter bed rest time and less complications.