Hydrocephalus is a common condition in neurosurgery, both primary and secondary to hydrocephalus. Many cranial disorders may cause hydrocephalus, such as intracranial inflammation, cerebrovascular malformation, traumatic brain injury, various endogenous or exogenous neurotoxins, hypoxia, water and electrolyte disorders, acidosis, liver and kidney failure, etc., which can cause fluid accumulation in brain tissue by different mechanisms. Currently, the treatment is mainly surgical in clinical practice. Shunt surgery for hydrocephalus is the most commonly used procedure, especially in primary care hospitals, where shunt surgery is recommended for the majority of patients with hydrocephalus. The bypass surgery for hydrocephalus has a lot of advantages, first of all, the effect is obvious, and it has a wide range of indications, simpler operation, and better implementation. However, hydrocephalus shunt surgery also has shortcomings, such as the possibility of intracranial infection, abdominal infection, blockage of the shunt and many other complications after surgery. According to statistics, most patients with hydrocephalus will have mild or severe complications three to five years after shunt surgery, and the incidence of complications after ventriculo-abdominal shunt surgery alone is reported to be 14%-58% in the literature, and 83% of the patients will be operated again due to shunt blockage in the second operation. So what should be done to treat blockage after hydrocephalus shunt to be effective? If the blocked shunt is found only during imaging, and the patient has no clinical symptoms, it can be treated or left untreated, but the patient should be closely monitored at all times. If the shunt blockage is followed by ventricular enlargement and neurological impairment, it is necessary to seek medical treatment in a timely manner, and systematic cerebral crestal fluid treatment is required to completely solve the problem through a comprehensive approach.