In the clinic, the conservative treatment of hydrocephalus in 80-year-old people includes regular lumbar puncture test, intravenous infusion of mannitol, and surgical treatment, etc. The details are as follows: 1. regular lumbar puncture test: through regular lumbar puncture test, more cerebrospinal fluid can be released, so as to achieve the purpose of alleviating the hydrocephalus, but this method can easily make the old man’s waist to produce obvious pain, and many times the old man’s body can not tolerate it. 2. intravenous infusion of mannitol: it can take the way of intravenous infusion of mannitol, but it is not a very long-term treatment. 3. Intravenous mannitol infusion: intravenous mannitol infusion can be taken, but it is not a very long term treatment. 3. Surgery: in order to have a fundamental treatment, surgery is still the mainstay, such as ventriculoperitoneal shunt treatment, but 80 year old people may be combined with other changes in the condition, so preoperative examination must be perfect, and ultimately to make clear the specific situation, in order to better carry out the treatment. In order to better treatment.