There are individual differences in survival rate after dialysis for 68-year-old patients, which are related to the underlying disease, lifestyle and so on, and cannot be generalized. Dialysis is generally used in renal failure where the kidneys cannot excrete normally, and the main modalities are hemodialysis and peritoneal dialysis. Although 68 years old is already an old man, as long as all the body functions are healthy, the survival rate after dialysis is very high. In the absence of underlying diseases such as diabetes mellitus, hypertension, hyperlipidemia, etc., the survival rate after dialysis will be greatly improved, and some people can reach more than 8 to 10 years. If the patient suffers from underlying diseases, such as diabetes, hypertension, hyperlipidemia, etc., then the effect of dialysis may not be as good as the normal population, and complications of dialysis, such as nausea, vomiting, arrhythmia, etc., may occur, and the relative survival time will also be reduced. Dialysis patients should follow a low-salt, low-fat, high-quality, low-protein diet, and avoid high-potassium foods such as spinach, oranges, and bananas. Dialysis should be carried out in strict accordance with the doctor’s instructions, and any discomfort should be reported to the attending physician to adjust the dialysis regimen to maximize the patient’s survival rate.