Patients with renal failure are prone to combine various complications, such as renal hypertension, severe electrolyte disorders, metabolic acidosis, renal anemia, coronary heart disease, etc. The common causes of death in renal failure are as follows: First, myocardial infarction, cerebral infarction and other cardiovascular and cerebrovascular complications. Patients with renal failure are prone to vascular calcification due to electrolyte disorders, which can lead to coronary heart disease, cerebral infarction and other causes of patient death. Second, cerebral hemorrhage, patients with renal failure have severe renal hypertension, and excessive blood pressure can easily lead to cerebral hemorrhage, resulting in death. Third, severe hyperkalemia can lead to lethal arrhythmias. IV. Severe acute left heart failure. V. Various serious infections, such as severe pneumonia.