The life span of compensated renal function will generally vary between 1-3 years, and some patients may be further prolonged if they are well controlled, because most of the compensated stage have no clinical symptoms, so they may miss the best time for treatment, and once they are found that they have already arrived at the decompensated stage. Compensatory period is mainly glomerular filtration rate is greater than 30 milliliters per minute, can not have any pathological manifestations, some patients to the hospital checkup abnormal urine test, further through the renal dynamic imaging can only be found that renal function is impaired, because of the discovery of the patient’s time is not equal, so the life expectancy can not be determined, but the length of time of compensatory period and the life expectancy of the patient is not directly related to the patient’s life expectancy, even if the patient arrives at the loss of compensatory period, long-term Patients on dialysis can currently live for 40 years, so it is important to take a positive view of renal failure disease.