The course of viral encephalitis in children is usually 1-4 weeks, but may last longer in patients with severe symptoms and may even cause sequelae. Viral encephalitis in children is an epidemic and the course of the disease varies from patient to patient depending on the child’s own immune system, the severity of the disease and the promptness of treatment. In general, if the patient has a strong immune system, the disease is mild, and treatment is timely, the patient can usually be cured within a week without any sequelae. If the patient’s condition is relatively serious, the course of the disease will be extended accordingly, and it will take about 4 weeks to recover after standard treatment. If the patient develops serious complications, it may take longer and may even cause irreversible damage to brain function. In conclusion, viral encephalitis in children is a very serious disease, and untimely treatment can have very serious consequences. In addition, it is important for the child to take appropriate sports to improve his or her physical fitness after treatment to avoid reinvasion of the virus and to facilitate recovery.