Patient Wei Moumou, male, 54 years old, had left leg pain for three months, aggravated for one week. The patient had severe pain in the left leg in upright position, sitting position and lying position, and the pain was tolerable only in flexion of the left leg in right side lying. MRI and CT showed that the lumbar 45 intervertebral disc protrusion combined with intervertebral joint hypertrophy and osteophytes at the posterior edge of the vertebral body had both disc protrusion and bony spinal stenosis caused by osteophytes. The lumbar disc herniation was removed by foraminoscopy, and the hyperplastic bone was removed by microscopic power grinding drill. The patient’s pain disappeared completely after the operation, and the MRI was repeated three days after the operation, and the spinal stenosis was completely cured. He Yongjin, Department of Pain, Tianjin First Central Hospital 1. Preoperative MRI photo of this patient: 2. Postoperative MRI photo of this patient: 3. Intraoperative application of power grinding drill photo: 3.