Brain tumor in children is a common malignant tumor in childhood, the initial obvious symptoms are headache, vomiting, optic papilloedema, cranial enlargement and occasional seizures, the specific clinical manifestations should be analyzed with the degree of tumor invasion. 1. Mental status will be relatively poor. It is usually caused by the brain tumor compressing the blood vessels in the brain, stimulating the nerves and pulling the surrounding structures. 2. Vomiting: As the headache worsens, it can be accompanied by the symptoms of jet vomiting, and the headache can be relieved after vomiting. Since headache and vomiting are also seen in gastrointestinal disorders, parents may mistakenly think that the child is suffering from gastrointestinal disorders, so it is recommended that such symptoms should not be taken lightly, but should be actively treated by a doctor. Children may unconsciously rub their eyes, which is caused by the transient blurred vision caused by optic papillar edema. If the original disease is not corrected in time, the child’s vision may gradually diminish or even become blind; 4. Functional disorders, such as sensory disorders and mental disorders, may appear, but they are less common. Some children may have diplopia and irregular fever, and more serious cases may have mental disorder, progressive dementia, hydrocephalus, etc. Therefore, timely treatment is needed to control the development of brain tumor, which can be carried out through drugs, surgery, radiotherapy and other methods. Surgery is mainly to remove all tumor tissues, while radiation and chemotherapy are mainly for those who cannot be completely removed by surgery and those who are prone to recurrence.