Viral encephalitis is a common and frequent disease in pediatric neurology, mostly seen in children within 2 years of age, mainly occurring in summer and autumn, with about 70% occurring from June to November. It is an important disease that threatens human health because of its rapid onset, seriousness, rapid changes, and high mortality rate, and survivors are often left with varying degrees of sequelae, causing a heavy economic and psychological burden on patients and families. The following are the early symptoms of pediatric encephalitis, and I hope that parents will pay attention to them. 1. High body temperature that does not subside, repeated use of antipyretic drugs is ineffective, especially when the body temperature is as high as 39 ℃ for more than 4 hours. 2, mental behavior abnormalities, such as irritable crying restlessness, mental depression indifference, drowsiness, especially after the fever is still poor spirit. 3, poor appetite, frequent vomiting, headache. Small infants refuse milk, do not eat, do not cry, do not move. 4.Convulsions, tremors, shaking of limbs, unstable walking. When the child has the upper sensation, once the above manifestations appear, immediately send to a regular hospital with pediatric critical care technology for consultation.