The principles of hydrocephalus management after aneurysm surgery depend on whether the hydrocephalus is acute, because after an aneurysm bleeds, a large amount of subarachnoid blood enters the cerebrospinal fluid circulation pathway, resulting in blockage of the cerebrospinal fluid circulation pathway, which leads to intracerebroventricular blood accumulation and causes acute hydrocephalus. Acute hydrocephalus requires emergency management and is resolved by extraventricular drainage surgery. By draining the intracerebroventricular blood accumulation and then releasing the bloody cerebrospinal fluid as soon as possible through lumbar puncture and lumbar pool placement, the cerebrospinal fluid circulation pathway is cleared and the ventricular drainage tube can be removed, and the cure can be achieved. Of course, there are some patients with massive hemorrhage, causing arachnoid granular adhesions to form traffic hydrocephalus, i.e. chronic hydrocephalus, which usually forms gradually 1-2 months after the onset of the disease, and at this time, only through artificially established channels. At present, ventriculo-abdominal shunt surgery is more commonly used, in which intracerebroventricular fluid is eventually drained into the abdominal cavity through a subcutaneous drainage tube and then absorbed through the large omentum of the abdominal cavity, finally achieving a balanced state of cerebrospinal fluid circulation pathway.