Indications of renal dialysis mainly include the following points: 1, reaching the uremic stage of chronic renal failure, that is, creatinine is greater than 707 μmoI/L or more, or endogenous creatinine clearance is less than 10 ml/min or less, can be considered for renal dialysis treatment. 2, if there is a combination of severe electrolyte disorders, such as severe hyperkalemia, potassium is greater than 6.5 mmol/L or more or If there is severe electrolyte disorder, such as severe hyperkalemia, blood potassium is more than 6.5mmol/L or lethal acidosis, the pH is less than 7.15 or below can be considered for dialysis treatment. 3, patients with intractable heart failure can be considered for dialysis treatment. 4, patients with drug poisoning and pesticide poisoning can be cleared out of the body through dialysis, so they are also very suitable for dialysis treatment.