The life span of hydrocephalus caused by brain tumor must be treated according to the specific situation at that time. Because different parts of the brain tumor growth cause hydrocephalus of different acute and chronic degree, these may lead to different life expectancy, the relatively extreme situation will cause the patient’s death in two or three hours; some form chronic hydrocephalus may cause the patient’s death in three or four months, so these are different. And there is also a point whether to take the correct treatment measures, will also have a very significant impact on the life expectancy, such as cranial brain tumor compression of the cerebrospinal fluid, normal circulatory pathway caused by hydrocephalus formed acute hydrocephalus, immediately for ventricular extracerebral puncture and drainage surgery, can be drained out of the cerebrospinal fluid, can be effective in reducing the probability of death in the acute stage. If in the later stage, can also be the tumor removal or carry out extraventricular peritoneal shunt surgery, which can also effectively go to alleviate the patient life expectancy. So everyone’s condition is different and must be judged according to the situation at that time.