Knee flexion and extension exercises are usually performed the next day after the femur fracture is securely fixed by surgery. Femur fracture includes proximal femur fracture (femoral neck fracture, intertrochanteric femur fracture), femoral stem fracture and distal femur fracture (supracondylar fracture, intercondylar fracture). Weight-bearing is strictly prohibited in the early postoperative period of femur fracture, but early knee flexion and extension exercises can be performed without weight-bearing on the second day after surgery to avoid knee adhesion and quadriceps atrophy, which may lead to muscle weakness. After the fracture surgery, keep the incision site dry to prevent incision infection, eat nutritious and light food, keep a positive and healthy mindset, and carry out rehabilitation exercises as soon as possible. After femur fracture surgery, functional exercises should be carried out under the guidance of professional doctors to avoid delaying the condition.