The optimal time for sudden death resuscitation is generally 4-6 minutes, and the earlier the resuscitation time, the higher the success rate. For patients with sudden death by electric shock or hypothermia, this rescue time can be extended. Once sudden death occurs, cardiopulmonary resuscitation and other resuscitation measures should be carried out immediately. The earlier the resuscitation, the lower the degree and probability of cardiac and cerebral injury occurring in sudden death, and the better the resuscitation effect. If the resuscitation is not timely, or the resuscitation is ineffective, the patient can enter irreversible biological death within a few minutes. Currently, traumatic diseases account for the first rate of sudden death, while the neurological system, cardiovascular system, digestive system, and poisoning decline in order, but the mortality rate of cardiovascular system causes is high, among which sudden cardiac death is the most common. The emergency response time is important for the recovery of consciousness of successful pre-hospital cardiopulmonary resuscitation survivors, and the public should be actively strengthened to promote the knowledge of first aid, improve the skills of cardiopulmonary resuscitation, and promote automatic external defibrillators.