Various cranio-cerebral disorders can disrupt the circulatory balance of cerebrospinal fluid, causing excessive accumulation of cerebrospinal fluid in the skull and the formation of hydrocephalus. The accumulation of excess cerebrospinal fluid in the ventricles increases intracranial pressure, which in turn affects the normal functioning of the brain. Cerebrospinal fluid shunts are a classic clinical treatment for hydrocephalus, but, according to a large number of clinical findings, shunts can easily lead to shunt blockage after shunts. Shunt blockage is mainly due to the small aperture of the shunt tube. During the shunt process, bloody cerebrospinal fluid and proteins and impurities in the cerebrospinal fluid can be blocked in the shunt tube. Shunt blockage can occur in any part of the shunt system and can cause the re-emergence of existing hydrocephalus symptoms, leading to a recurrence of hydrocephalus. In addition, there is a special type of shunt blockage that is associated with shunt infection, even though the shunt is not blocked when it is removed after clinical surgery, but it does not have a drainage effect. It is important to keep a close eye on the patient’s own condition after hydrocephalus shunt surgery and to perform regular follow-up examinations. If symptoms such as dizziness, headache, nausea and vomiting, loss of vision, epilepsy, etc. occur, it is necessary to go to the hospital in time to diagnose whether the shunt is blocked or not. If the shunt is blocked, careful examination and proper disposal should be carried out in a regular hospital as soon as possible, and the shunt should be adjusted or replaced with a new one according to the patient’s own condition, otherwise the patient’s life will be in danger.