The way of eliminating hydrocephalus after craniotomy must be judged according to the situation at that time, because every patient’s condition is different. Generally speaking, if the hydrocephalus after craniotomy belongs to acute hydrocephalus, that is to say, the symptoms change very quickly and gradually show a tendency to aggravate, such a need to be eliminated through surgical means, generally choose the way of ventriculoperitoneal puncture and drainage surgery to get rid of it, which is the fastest way, and the most effective. If the hydrocephalus is chronic, it is usually treated by ventriculoperitoneal shunt surgery, that is, artificially draining the cerebrospinal fluid into the abdominal cavity and absorbing it through the abdominal cavity, this kind of surgery has a relatively high safety coefficient, but sometimes if the hydrocephalus is a very small amount of hydrocephalus, it can also be completely relieved through self-absorption, and it is necessary to judge the situation according to the situation.