The length of living time after kidney necrosis is very much related to the extent of kidney necrosis. If only one kidney is necrotic or part of one kidney is necrotic, while the other kidney is normal, this situation will not affect the patient’s survival life, because normally one kidney can do the work of two kidneys. This is the reason why patients with uremia undergo kidney transplantation and survive for a long time with the help of one kidney. If both kidneys are necrotic, completely lost the ability to detoxification, drainage, equivalent to enter the uremia stage, this time need to use long-term hemodialysis to survive, then the survival time may be between 10-20 years, the better can reach more than 20 years. Besides, the cause of renal necrosis needs to be actively searched for, because the underlying cause of renal necrosis may cause fatal damage to the body and even lead to sudden death.