The symptoms of giant aneurysm of the cavernous sinus segment of the internal carotid artery are relatively benign compared to other aneurysms, and intracranial aneurysms without bleeding then require urgent treatment. The main manifestations are compression symptoms: such as abduction palsy, motility palsy and other eye movement disorders, or facial pain and facial palsy. It may also manifest as fatal rhinorrhea, intracranial hemorrhage and cerebral infarction. Treatment includes minimally invasive interventional methods, various stent-assisted spring-ring embolization. The advantage is that it is minimally invasive, the disadvantage is that the recurrence rate is very high and it requires 200,000 or even 300,000 dollars for treatment. Qi Hui, Department of Neurosurgery, Peking University Shenzhen Hospital High-flow vascular bypass combined with internal carotid artery occlusion is an alternative approach. In some patients, the eye disorder can be relieved quickly after the surgery and the aneurysm can be fixed once and for all without recurrence. However, the disadvantage is that the procedure is relatively difficult and not all hospitals are able to perform it.