Ou xx,male, 46 years old, ,Ankylosing, spondylitis with kyphosis ,before operation ,the patient with complete spinal ankylosis,had a serious imbalance in the trunk sagittal plane and severely resticted field of vision and can’t see the front ,thoracic severe oppression limited abdominal breathing,can’t be lying,his life is very painful,ZhangHongqi professor of our section personally performed the operation of posterior L3 wedge osteotomy ,after operation the patient can face up to the front ,lifting the abdominal pressure,abdominal breathing improved,and the patient can be lying ,the patient are very satisfied with the curative effect,.this Ankylosing, spondylitis with kyphosis is one of the spinal deformities which are the most difficult to deal with ,wedge –shaped by the single segement  lumbar vertebral’ is currently the world’s most advanced treatment with the most precise orthopedic effect for this disease.Only a few large national hospital successfully carried out such operations.