Guo××, male, 34 years old, was admitted to the hospital with the main reason of “thoracolumbar pain and limitation of movement for 13 years, aggravated by deformity for 3 years, and 3 years after hip surgery”. The patient was diagnosed with “ankylosing spondylitis” in 2001, and gradually developed thoracolumbar hunchback deformity 3 years ago. He underwent double hip arthroplasty in an outside hospital. The deformity of the thoracic back and neck has progressively increased since the operation. He gradually developed neck stiffness, hunchback deformity, inability to move his neck, chest and waist, inability to look forward with both eyes, inability to sleep in the prone position, and serious decline in quality of life. Physical examination: visual examination: severe kyphosis of the cervicothoracic spine, kyphotic hunchback deformity of the thoracolumbar spine, and inability to look forward with both eyes. Palpation: no pressure pain, percussion pain, no conduction pain, radiating pain, no significant hyperalgesia of the trunk and limbs. Dynamic diagnosis: the active and passive movement of the whole spine was limited, the neck was tonic, and the muscle tone of the extremities was significantly increased. The tendon reflexes of the lower extremities were active. There was no significant abnormality in muscle strength and sensation of the extremities. Third, auxiliary examination: X-ray plain film: loss of physiological curvature of the spine, bamboo-like changes. The cervicothoracic segment was severely deformed; the thoracic spine had degenerative changes; the lumbar spine was deformed posteriorly with degenerative changes. In order to resolve the compression of the esophagus caused by the maxillo-thoracic deformity and to ensure that the patient could eat normally, it was decided that the cervicothoracic segment should be osteotomized first to correct the maxillo-thoracic deformity, and then the thoracic/lumbar segment should be osteotomized later. The cervicothoracic osteotomy was performed under general anesthesia, and internal fixation with pedicle screws was performed. Six months later, a posterior convexity osteotomy (lumbar segment) was performed under general anesthesia with internal fixation of pedicle screws.