Abstract: Objective: To investigate the clinical efficacy of proximal femoral nail(PFN) and dynamic hip screw(DHS) treatment of intertrochanteric fracture.Methods: One hundred and fifty-eight cases of intertrochanteric fractures in elderly patients were selected as research subjects,which 128 cases were treated with DHS,30 cases were treated with PFN.Treatment effect of two surgery was compared.Results: There was no statistical difference about the operation time,blood loss,postoperative drainage,and healing time,between the group of DHS and PFN of A1,A2 patients with fractures(P>0.05);The Operative time,blood loss,amount of postoperative drainage and healing time in group of DHS patients with type A3 fracture were significantly more than in group of PFN(P<0.01);postoperative Harris scores in type of A1 and A2 fractures at each time point had no statistical difference between group DHS and PFN(P>0.05);The postoperative Harris scores of A3 fractures in group of DHS were significantly lower than that in group of PFN at each time point(P<0.01);Pain VAS scores of each group 1 month,3 months,6 months postoperative were significantly lower than preoperative(P<0.01),There was no statistical difference between the VAS scores of all groups(P>0.05);1 case of pulmonary embolism happened in group of PFN patients with A3 fracture.Conclusions: PFN,DHS has achieved satisfactory results for A1,A2 senile intertrochanteric fracture;Among A3 for intertrochanteric fracture,PFN has better mechanical stability,the effect is better than DHS.