Postoperative precautions for lumbar spinal stenosis include proper rest, avoiding strain and stress on the lower back, proper functional exercises for the lumbar back muscles, and observing the drainage and healing of the wounds. Lumbar spinal stenosis surgery often requires internal fixation treatment, after surgery, we must pay attention to bed rest, avoid excessive weight bearing and stress on the lower back, to avoid fracture of the internal fixation and premature weight bearing to cause aggravation of local symptoms. After the operation, we should carry out the functional exercise step by step, in the early stage, we can carry out the straight leg raising functional exercise, and when there is no obvious pain in the low back, we should carry out the proper functional exercise of the low back muscles, such as walking backwards and arching bridge exercise. After the operation, we should pay attention to the observation of drainage, pay attention to the size of the drainage flow, and observe the wound healing. After lumbar spinal stenosis surgery, we should also pay attention to nutritional balance, eat some milk and other foods with high calcium content and vitamin-rich fresh fruits and vegetables, pay attention to warmth, avoid cold, and at the same time pay attention to avoiding some bed complications, such as pressure sores, lung infections, etc., and pay attention to turn over and pat the back to avoid localized compression.