Lower extremity fractures, commonly include: heel fracture, talus fracture, tibiofibular fracture, femur fracture, pelvis fracture, etc. Among them, femur fracture is often also distinguished as femoral condyle fracture, femoral stem fracture, femoral rotor part (rudimentary) fracture, femoral neck fracture, etc.; pelvis fracture can also be divided into acetabular fracture, sacral fracture and pelvic fracture. The main function of the lower extremity is weight-bearing, so the main purpose of postoperative exercises for lower extremity fractures is to restore the joint extension and flexion function and weight-bearing function of patients. Before the initial healing of the fracture, weight bearing, because the fracture has not yet healed, the weight of the body is not borne by their own bones, but by the internal or external fixation, over time, even if a small force repeatedly acts on the fixation device at the fracture end, it is easy to cause fatigue fracture of the fixation device, and the patient needs to re-surgery to install the internal fixation, which causes a heavy economic burden. Therefore, reasonable, timely and appropriate postoperative exercise is very necessary. 1.Exercise within 2.5 months after lower limb fracture It takes 2-3 months for the initial healing of fracture, so it is not recommended for patients to exercise with weight before then. (1) Joint extension and flexion exercise: the sooner the better, the better, the second day after surgery, in the surgical site pain can be tolerated, oral appropriate pain medication, that is, to start extension and flexion exercise, if the patient really can not carry out the active activities of the joint, can be accompanied by the help of passive joint extension and flexion exercise. Of course, active exercise is the active contraction of the patient’s muscles, and its effect of preventing muscle atrophy of the lower limbs, preventing edema and promoting edema absorption, and preventing thrombosis is significantly better than passive extension and flexion exercise. (2) About going to the ground: At this stage, except for pelvic and acetabular fractures, patients can move to the ground with the help of crutches as long as their physical condition allows, provided that the affected limbs do not bear weight. (3) Patients should try not to sleep during the day, otherwise they will not be able to sleep at night after sleeping enough during the day, and their attention will be shifted to the surgical site, which will obviously amplify the discomfort at the surgical site. (4) The elderly need to eat a reasonable diet and eat more vegetables with fiber, which can prevent constipation; meanwhile, the main supplement is calcium, and those with osteoporosis need to pay attention to supplementing milk, tofu, lean meat, calcium tablets, osteotriol (to promote calcium absorption); drink more water; and do more deep breathing to promote phlegm discharge. 2, the affected limb down to the ground weight-bearing exercise after 2 and a half months after surgery, the patient began to go down to the ground, the affected limb began to part of the weight-bearing exercise, it is recommended that patients have a scale at home, early part of the weight-bearing generally from 1/3 of the weight, for example, the patient weighs 60 kg, can start from 20 kg weight-bearing, the method is: double crutches to support the weight, the affected foot stepped on the floor scale, stepped on 20 kg to lift, then stepped on, then lifted, and so on. Increase one kilogram per day, about 40 days after the affected limb can bear the patient’s full weight, at this time you can throw away the crutches and practice normal walking on both lower limbs. 3. Emphasize the importance of post-operative review The first post-operative radiographic review of the lower limb fracture is usually performed in the hospital at 2 months, which is very important, and patients can communicate with their own doctors if they have any problems, so that problems can be detected in time and complications can be prevented.