Lumbar spinal stenosis usually does not heal on its own. There are many causes of lumbar spinal stenosis, including lumbar disc herniation, osteophytes, lumbar spondylolisthesis, and hypertrophy of the ligamentum flavum. For lumbar spinal stenosis caused by lumbar disc herniation, the herniated disc needs to be removed; if it is caused by osteophytes, the enlarged bone needs to be removed; if it is caused by lumbar spondylolisthesis, lumbar spondylolisthesis repositioning and internal fixation is needed; if lumbar spinal stenosis is caused by hypertrophy of the ligamentum flavum, the ligamentum flavum needs to be completely removed. When these factors are removed, the local nerve compression will be restored, which in turn will improve the symptoms of lumbar spinal stenosis. Patients with lumbar spinal stenosis should pay attention to postoperative care, prevent decubitus ulcers and pneumonic pneumonia, perform lumbar muscle exercises to prevent muscle atrophy, and strengthen muscle strength to maintain the stability of the lumbar spine.