After 40 days of intramedullary nail fixation of femur fracture, the nursing care mainly focuses on helping functional exercise and restoring the function of lower limbs. Femur fracture using intramedullary nail fixation is more solid, 40 days after the fracture, generally there will be a small amount of fracture site scab formation, care is mainly to restore function. For example, long time bedridden lower limb muscle atrophy, muscle weakness, you can take the initiative to flexion and extension activities of the hip joint, knee joint, ankle joint. Massage the thigh and calf muscles to promote blood circulation in the lower limbs and restore muscle function. You can also get out of bed with crutches to carry out functional exercises for protection, to prevent the patient from falling, to avoid complete weight-bearing of the affected limb. Femur fracture intramedullary nail fixation 40 days after the care precautions, it is recommended that patients go to the hospital to consult the doctor.