Objective To investigate the clinical effect of PFNAII internal fixation in the treatment of unstable intertrochanteric fractures in the elder patients. Methods A total of 60 senile patients with unstable femoral intertrochanteric fracture in Puning people′s hospital from November 2015 to May 2017 were selected and divided into two groups according to different surgical methods.Patients received PFNA-Ⅱ internal fixation were regarded as internal fixation group

while patients received hemiarthroplasty treatment were regarded as the artificial joint group

with 30 cases in each group.The curative effect

the incidence of complications and functional recovery of the two groups were compared. Results The operation situation of internal fixation group was better than that of the artificial joint group

with statistically significant differences(P<0.05).The total effectiveness rate of internal fixation group was 96.67%

while 90% in the artificial joint group

the difference was no significant(P>0.05).The incidence of complications in internal fixation group and the artificial joint group were 13.33% and 46.67% respectively

with statistically significant differences(P<0.05).The Harris score between two groups in 3 months postoperation had statistically significant difference(P<0.05). Conclusion Minimally invasive PFNAII internal fixation can improve postoperative recovery effect and reduce postoperative complication for the elderly with unstable intertrochanteric fractures.