The pelvic ring is a bony ring consisting of the sacrococcygeal bone in the posterior middle and the hip bone on each side. The hip bone consists of three parts: the iliac bone, the pubic bone and the sit bones, and the intersection of the three bones forms the acetabulum of the hip joint. The pelvic ring has the sacroiliac joint in the back and the pubic symphysis in the front, and there are many strong ligaments between each other to form a strong bone ring. Pelvic fractures are usually: stable fractures caused by low-energy trauma; and fractures caused by high-energy trauma. As with other fractures, low-energy trauma to the pelvis usually produces a stable fracture that can be treated symptomatically, such as with crutches or a walker, and most patients can expect to heal successfully. High-energy trauma fractures of the pelvis often require surgical treatment, which depends on the degree of pelvic stability present after the injury. The aim of surgery is to restore the stability of the pelvic ring and, when there is an acetabular fracture, the anatomical structure of the acetabulum. However, it is difficult to assess and express the degree of stability of the reconstructed pelvis, and the most authoritative judgment comes, of course, from the surgeon who performed the surgery. Depending on the situation, the duration of bed rest can be as short as 1 to 2 weeks or as long as 3 months or more, which brings uncertainty in the rehabilitation program, but the principle remains the same: regardless of the stage of rehabilitation, three factors need to be considered: maintaining physical fitness, training muscles, and exercising joint mobility. The overall rehabilitation program after pelvic fracture is first of all about the maintenance of physical strength and the improvement of general condition, and the training focuses on the recovery and maintenance of hip mobility, as well as the muscle strength training of the iliopsoas muscle and the muscle groups around the hip joint. The pelvis is rich in blood flow, so the fracture can heal easily; and because there are thick muscle attachments around the pelvis, it can play a certain role in fixation. Generally, about 3 weeks after the injury, the initial fibrous connection has been made locally, and the fracture will not occur again when the abductor is moved to the ground. If the posterior weight-bearing arch of the pelvis is not injured, it is most appropriate to leave the bed and exercise early. The exercise method should depend on the type of injury, time and condition. If the posterior pelvic arch is not affected, exercise the contraction function of the lower limb muscles (quadriceps) in the first week after the injury, exercise the flexion and extension function of the joints of the lower limb in the second week, leave the bed and stand with the help of crutches in the third week, and gradually walk and exercise. Straight leg raise (passive to active), exercise the quadriceps and hip flexion and extension function. Sitting and standing, neck flexion, hip flexion and extension exercises. Those who affect the posterior pelvic arch should be performed 1 week later in the above order. For those who need to use bone traction, the muscle contraction activities and flexion and extension activities of each joint during traction should not be neglected. After the release of traction, the patient should leave the bed in time to walk with the help of crutches and carry out reasonable functional exercises. After the fracture is healed, gradually practice sitting and standing in bed to exercise the function of the hip joint. Methods include: 1. lying on the bedside, holding the knee with one hand and extending one leg backwards to exercise the hip flexion and extension function; 2. holding both knees and feet crossed, bending the hip and knee to exercise the hip and knee function.