Comminuted fracture of the left femur usually requires hip replacement surgery, and postoperative rehabilitation mainly includes exercise rehabilitation, physical therapy, massage and so on. During the postoperative bed rest period, you can flex and extend the hip joint, and practice thigh muscle contraction and knee extension. Depending on the individual’s condition, you can get down to the ground 24 hours after surgery with the help of others or using a walker. After getting down to the ground after the operation, carry out hip middle muscle abduction muscle strength exercises as soon as possible. The use of physical therapy such as electrotherapy and infrared rays, together with the diastolic and contractile exercise of the affected limb muscles, can promote the blood circulation of the affected limb, eliminate swelling and prevent muscle atrophy. After the fracture heals and the external fixation is removed, it is a critical period for rehabilitation, especially for those who have not had enough rehabilitation before, and need to restore the range of motion of the joints and muscle function through exercise. In addition, massage, acupuncture, and topical medication can also be used to help recovery. Rehabilitation after fracture must be carried out under the guidance of a doctor to avoid delaying the effect of rehabilitation and causing secondary injuries.