1.Protection of the trunk for post-operative orthopedics to avoid accidental injuries. Promote surgical recovery, reduce pain. 2, can make the scope of surgery (fixed segment reduction), only fixed more serious bending, not serious bending, through the postoperative brace to strengthen and rapid recovery. 3.It can reduce the number of operated segments and reduce trauma. 4.The preservation of more fixed segments of the lumbar spine makes it possible to retain more postoperative lumbar flexibility. 5.Promote the new postoperative trunk balance to accelerate the rapid recovery.