Hydrocephalus is a condition in which the amount of cerebrospinal fluid in the skull increases due to cranial disorders that cause excessive secretion of cerebrospinal fluid or (and) impaired circulation and absorption, and the ventricular system enlarges or (and) the subarachnoid space enlarges. It is usually children who suffer from this disease, so parents must learn more about this disease and be properly examined during pregnancy. So, what can be done to effectively prevent hydrocephalus? The following are preventive measures for hydrocephalus: 1. Promote knowledge of eugenics and reduce the number of births. According to relevant data, the risk of hydrocephalus in the fetus can be increased by the increase in the number of births of pregnant women. The incidence of hydrocephalus increases significantly in those with more than two children. Therefore, to promote eugenic knowledge and reduce the number of births is one of the ways to prevent hydrocephalus children. 2, strengthen eugenics education, improve the quality of population culture. According to the relevant statistics, the occurrence of hydrocephalus and maternal literacy, the lower the literacy of pregnant women, the higher the incidence of illiterate and semi-literate offspring have the highest rate of disease. Therefore, in order to improve the health quality of the population, we should first improve the cultural quality of the population, in order to enhance the public’s acceptance of eugenics education and self-care awareness. 3.Strengthen early prenatal diagnosis and early termination of pregnancy to prevent the birth of children with hydrocephalus. Early prenatal diagnosis of children with hydrocephalus is an important way to prevent the birth of children with hydrocephalus. As obvious hydrocephalus can be detected by ultrasound at 12-18 weeks of pregnancy, so we should strengthen the application of ultrasound in prenatal diagnosis, early termination of pregnancy to prevent the birth of hydrocephalus and reduce the birth rate of congenital hydrocephalus. 4, advocate appropriate age birth from the relevant data show that the incidence of hydrocephalus malformations with the increasing age of pregnant women and the trend of increasing. General 25-29 years old group has the lowest incidence, but the difference is not significant, after 30 years old, the incidence has an increasing trend. Therefore, it is important to promote age-appropriate childbirth to prevent the occurrence of hydrocephalus children.