Neurosurgical diseases are often rapid in onset and serious in nature, and one of them is known as an intracranial “untimely bomb” because of its rapid onset and easy recurrence. It is the first cause of subarachnoid hemorrhage and the third cause of cerebrovascular accidents after cerebral thrombosis and hypertensive cerebral hemorrhage. It can develop at any age, mostly in middle-aged and elderly women between 40 and 60 years old. The cause of intracranial aneurysms is not well understood, but most scholars believe that intracranial aneurysms are caused by local congenital defects in the walls of intracranial arteries and increased intraluminal pressure, and that hypertension, cerebral arteriosclerosis, and vasculitis are related to the occurrence and development of aneurysms. 80% to 90% of patients with aneurysms are detected because of subarachnoid hemorrhage caused by rupture and bleeding, so the symptoms of hemorrhage are most common with spontaneous subarachnoid hemorrhage. Subarachnoid hemorrhage is the most common manifestation of hemorrhage. In some patients, there are obvious triggers before the aneurysm ruptures, such as heavy physical labor, coughing, straining to defecate, running, drinking, emotional stress, and so on. Some patients may have no obvious trigger or even occur during sleep. Most patients have a sudden onset, and headache and disturbance of consciousness are usually the most common and prominent manifestations. CTA can replace cerebral angiography to a certain extent, and it is fast and convenient, so it can be the first choice for aneurysm screening. Once diagnosed, it should be treated as early as possible, otherwise there is always a risk of rebleeding. The most common methods of surgical treatment include interventional embolization and craniotomy. The purpose of surgery is to block the blood flow in the aneurysm and eliminate the risk of rebleeding, thus defusing this “untimely bomb”. Our department currently has an experienced “bomb disposal unit” that can treat most of the aneurysms, including various complex giant aneurysms, shuttle aneurysms, and clotted aneurysms. At present, our department completes more than 100 cases of aneurysm clamping and more than 130 cases of interventional embolization every year, with precise clinical efficacy and low mortality and disability rate. Schematic diagram of aneurysm stenting with spring coil embolization Schematic diagram of aneurysm craniotomy