Abstract: ob＜x＞jective: To investigate the efficacy of adjustable shunt in patients with idiopathic normal pressure hydrocephalus. Methods: Forty patients with idiopathic normal pressure hydrocephalus who met the diagnostic criteria from January 1, 2016 to May 30, 2019 were treated with ventriculo-peritoneal shunt. Twenty patients used a fixed-pressure shunt as a control group, and another 20 patients used an adjustable shunt as an experimental group. The efficacy and complications between the two groups were observed and recorded.Compared with control group, in terms of clinical symptoms, the time nd step number f 10 m reentrant walking test, and MMSE score f the patients were statistically significant (P<0.05). In terms of ventricular size, experimental group EI nd CA f the patients were statistically significant (P<0.05). In terms of prognosis, experimental group MRS and GOS f the patients were statistically significant (P<0.05). MoCA assessed the overall cognitive status of the two groups. The results showed that the patients in the control group had lower scores in total score, visual space, attention and executive ability, and the difference was statistically significant (P<0.05). FAB and SWT evaluated the executive function of the two groups. The results showed that the control group had a relatively low score in the frontal lobe function rating scale test and the Struer color test. The difference between the two groups was statistically significant (P <0.05).In the control group, 1 case had postoperative infection, 2 cases had shunt obstruction, 2 cases had shunt, and 1 case had excessive shunt. The complication rate was 30%. In the experimental group, 1 case was infected, 1 case was blocked by shunt, 0 cases were shunt and shunt, and the complication rate was 10%.Conclusion: Adjustable shunt tube ventriculo-peritoneal shunt for patients with idiopathic normal pressure hydrocephalus has better therapeutic effect and lower incidence of complications, which is worthy of further application and promotion.