Brain stenting surgery is dangerous. Brain stenting is a kind of brain stenting surgery done by patients because of cerebral artery stenosis, which is more difficult and risky, and belongs to interventional surgery, which is level 4 among neurosurgery levels and is the highest level. Usually, stenting is considered only when the patient is found to have more than 75% cerebral artery stenosis and has corresponding cerebral ischemic symptoms under the premise of vascular intervention. Arterial stents are usually placed in the responsible vessels, but they are more likely to cause arterial plaque dislodgement during placement, leading to severe cerebral infarction. To reduce the risk of the procedure, it is better to place the recovery umbrella distal to the stenosis.