Summarize the emergency care experience of severe heart stroke in a 6-year- old child who was left in a closed car carriage. To solve the major problems such as thermal asphyxia，body fluid loss，repeated febrile convulsions，we implemented combined cooling technology，continuous core temperature monitoring，target-oriented capacity management to maintain the balance of water，electrolyte and acid-base，the management of artificial airway to effectively keep the airway unobstructed，case of repeated convulsive seizures，and family participatory care. After 6 h of emergency multidisciplinary emergency treatment and precision care，the child was successfully transferred to the emergency intensive care unit for further treatment，and later transferred to the other hospital for rehabilitation treatment. After a follow-up of one month，the child had a good prognosis.