Lumbar spinal stenosis is common in people over middle age, more men than women, and the main symptoms of patients are long-term recurrent lumbar pain and intermittent claudication. The nature of the pain is soreness or burning pain, some of which may radiate to the outside or front of the leg, etc. The symptoms may alternate between the left and right legs. When standing and walking, lumbar and leg pain or numbness and weakness appear, the pain and limp gradually worsen, and even can not continue to walk, and the symptoms improve after rest, and cycling is not hindered. In severe cases, it may cause urinary urgency or difficulty in urination. Some patients may develop lower limb muscle atrophy, hyperalgesia, dull knee or Achilles tendon reflexes, and positive straight leg raise test. However, some patients have many complaints and do not have any positive signs. The taking of lumbar frontal, lateral, hyperextension and hyperflexion X-rays, as well as CT and MRI can help in the diagnosis, and changes such as narrowing of the intervertebral space, osteophytes, slipped vertebrae, enlarged lumbosacral angle and hypertrophy of small articular processes are often seen between lumbar 4 to 5 and lumbar 5 sacral 1.