Abstract: Objective: To analyze the curative effects of the elastic intramedullary nail fixation combined with hip spica plaster external fixation in the treatment of subtrochanteric fracture.Methods: Thirteen children with subtrochanteric fractures were treated with the elastic intramedullary nail fixation combined with hip spica plaster external fixation under C arm machine.The injured limb function after treatment was evaluated using the standard scoring of the Flynn intramedullary nail in treating femoral fracture.Results: No surgical site infection and primary healing in all cases were found.During the 12 months of following up,the intramedullary nail fracture,nonunion,epiphyseal injury and disease limb dysfunction were not found,and the irritation symptom of nail tail in 2 children disppeared after removing the intramedullary nail.All fractures were bony union.The excellent in 12 cases and good in 1 case were identified according to the standard scoring of Flynn,and the excellence rate of which was 100%.Conclusions: Under grasping the standardized reduction and internal fixation skill,the treatment of subtrochanteric fracture with the elastic intramedullary nail fixation combined with hip spica plaster external fixation in children is good effect,minimal invasion,safe and an ideal method.