To summarize the emergency nursing experience of a patient with cardiac arrest who was successfully discharged from hospital after public aid-prehospital first aid-in-hospital treatment. Aiming at the problems of unknown causes of sudden death，critical condition，no rescue experience of the first witness，needs of rapid recovery of vital signs，avoidance of brain injury and neurological dysfunction，a remote rescue team was established and early and rapid identification of the disease was performed to minimize the first aid blank period through remote control，unified command，division of labor and cooperation. Hemodynamic monitoring and volume management，multi- dimensional optimal target body temperature management，prevention of microcirculation disorders and other measures were implemented after spontaneous circulation recovery. After 2 hours of active rescue and meticulous nursing，the patient was transferred to EICU for further treatment，and was discharged smoothly 16 days later. After 6 months of follow-up，the patient was in good condition.