The way to eliminate hydrocephalus after craniotomy must be judged according to the situation at the time, because each patient’s condition is different. Generally, if the hydrocephalus after craniotomy is acute hydrocephalus, that is, the symptoms change very quickly and gradually show a trend of aggravation, such need to be eliminated by surgical means, usually choose the way of extra-ventricular puncture and drainage surgery for elimination, which is the fastest way and the most effective. If the hydrocephalus is chronic, it is usually treated by ventriculoperitoneal shunt surgery, which means that the intracranial cerebrospinal fluid is artificially drained into the abdominal cavity and absorbed through the abdominal cavity, and this surgery is relatively safe, but sometimes a very small amount of hydrocephalus can be completely relieved by its own absorption.