Whether acute renal failure can be cured or not should be judged according to the cause of renal failure, if it is pre-renal and post-renal, most of them can be cured; renal renal failure, some of them cannot be cured. 1. Pre-renal renal failure is caused by massive bleeding, severe vomiting, diarrhea, sepsis and other causes of blood volume reduction, renal blood flow is reduced accordingly, resulting in renal ischemia, in which case most of the renal function can be restored to normal after the above causes are corrected in time. 2. Renal failure, such as acute tubular necrosis, acute interstitial nephritis, etc., most of them can be recovered by active treatment; however, if the treatment is not timely, or the response to the treatment is not good, the renal function generally can not be recovered, and it can be transformed into chronic kidney disease. 3. Post-renal renal failure, such as urinary stones, tumors and other causes of urinary tract obstruction, if the obstruction can be lifted in time, most of the renal function can be restored. Acute renal failure is complex and variable, should consult a doctor in time, follow the doctor’s advice and active treatment.