The diagnostic criteria of spinal stenosis are divided into the following two kinds: the first is the clinical manifestation of the patient, if the patient is middle-aged, without obvious triggering factors, gradually appearing lower limb numbness, weakness, stiffness, inactivity, or even paraplegia, the existence of spinal stenosis of the thoracic spine should be highly suspected. If the patient has intermittent claudication, that is, walking for a period of time will appear lower limb pain, can not walk, and after resting for a period of time can continue to walk, we should be highly suspicious of the existence of lumbar spinal stenosis. The second is the corresponding auxiliary examination, in the above highly suspected patients to carry out the corresponding auxiliary examination, such as doing X-ray film, CT, MRI, can obviously find some direct or indirect imaging evidence. For example, some calcified ligaments or some excessive osteophytes can be seen on X-ray plain film, while on CT and MRI, some internal occupation of the vertebral canal can be seen, resulting in a thinning of the internal diameter of the vertebral canal. Of course, these imaging evidence can only be meaningful when combined with clinical symptoms, because the internal diameter of the spinal canal and the corresponding clinical symptoms vary greatly from patient to patient, and the diagnosis can only be made if there is imaging evidence of spinal stenosis and the patient has clinical symptoms.