With the increase in stress in the modern world, many people die suddenly, which is medically known as “sudden death”. Sudden death refers to a sudden onset or deterioration of an underlying natural disease history, resulting in sudden death within a short period of time. There is no uniform standard for the time from onset to death. Sudden cardiac death and non-cardiac sudden death can be classified according to the etiology. 1, sudden cardiac death is sudden death caused by various cardiac causes, and is currently recognized as death within 1 hour after the onset of acute symptoms. Patients with sudden cardiac death mostly have underlying diseases and have had warning manifestations of sudden death for a considerable period of time, but are only often ignored. Eighty percent of sudden cardiac death patients die from arrhythmias, of which 83% die from tachyarrhythmias, such as ventricular tachycardia and ventricular fibrillation; 17% die from slow arrhythmias. From the etiological analysis, coronary heart disease is the primary cause, accounting for about 65%; followed by cardiomyopathy. In addition, about 10% were caused by some primary abnormalities of cardiac electrical activity. 2, non-cardiogenic sudden death refers to the sudden death of patients due to diseases other than cardiac causes, accounting for about 25% of all sudden deaths. The main common clinical diseases include respiratory diseases such as pulmonary infarction and bronchial asthma, acute cerebrovascular disease (such as cerebral hemorrhage and cerebral ischemia) in neurological diseases, and digestive system diseases such as acute hemorrhagic necrotizing pancreatitis. In addition there are aortic coarctation, severe electrolyte disorders (such as endogenous hyperkalemia), etc. In daily life, it is recommended to do the following: scientific and healthy lifestyle, including maintaining a calm mind, reducing work stress, scientific diet, insisting on exercise, abandoning vices (quit smoking and alcohol), not overeating, balanced nutrition, etc.; also control hypertension, hyperlipidemia, hyperglycemia, obesity, etc.; regular checkups. Timely and effective diagnosis and treatment can help improve the prognosis, but overall, the consequences are not optimistic.