Zheng xx, female ,34 years old,L5,s TB before operation ,the patient felt lumbosacral pain ,lower abdominal tenesmus ,On Feb,11st 2005,he had a operation of posterior debridement clearance,,Laminectomy Decemppression ,fixation with screw-rod system ,After operation ,the patient’s symptoms got better ,Ac present,TB is healed without recurrence .