Most of the acute renal failure can be cured and generally does not affect the life span of the patients, only a very small number of them cannot be cured and progressed to uremia may affect the life span of the patients, and the survival period may range from several years to several decades. Pre-renal acute renal failure is mainly due to excessive loss of body fluids, such as nausea and vomiting, diarrhea and so on. Some patients suffer from acute renal failure as a result of traumatic hemorrhage, and these causes lead to insufficient perfusion of blood to the kidneys. This condition is treated symptomatically with blood transfusion and fluid replacement, and most acute renal failure can be cured. Renal acute renal failure is caused by the disease of nephropathy itself, such as lupus nephritis, purpuric nephritis, etc. This type of nephropathy can be cured by clarifying the pathological type and applying hormones (such as prednisone acetate) and immunosuppressant (such as cyclophosphamide) will play a good role in the treatment, and most of them can be cured. Post-renal acute renal failure is usually caused by obstructive factors, commonly urinary stones, prostatic hyperplasia and so on. Acute renal failure caused by these reasons will be cured by surgically relieving the obstructive factors and usually will not progress to uremia. Acute renal failure that does not progress to uremia generally does not affect the patient’s life expectancy, but some patients with acute renal failure may still have residual renal insufficiency despite active treatment, and the condition may progressively worsen to uremia, thus affecting the patient’s life expectancy, and the survival period may range from several years to several decades. Patients with acute renal failure are advised to go to regular hospitals in time and receive standardized treatment under the guidance of physicians to avoid delays.