It is the displacement of one vertebra forward or backward in another vertebra, preferably in the lumbar 4 or lumbar 5 vertebrae. Patients may have lumbosacral pain, soreness and swelling, which may be discharged to the back of the thigh or the whole thigh. It is sometimes accompanied by intermittent claudication, and radicular pain may occur when combined with disc herniation. Non-surgical treatment: including bed rest and avoiding weight-bearing on the lumbar region. Lumbar physiotherapy, brace protection, strengthening lumbar back muscle exercise and taking related drugs can often play a certain effect. Surgical treatment: For conservative treatment, severe slippage, accompanied by persistent nerve compression symptoms and spinal stenosis, surgical treatment can be adopted. The purpose of surgery is to decompress the nerve tissue, reset the slipped vertebral body, fuse the bone graft and internal fixation.