Ccessory renal artery is a kind of variation,imaging is an important means in diagnosing it. In recent years, the detection rate of accessory renal artery increased.Renal transplantation, interventional therapy and renal laparoscopic is becoming more and more. To improve the quality of the operation,we should give a correct preoperative assessment.A variety of imaging signs can guide treatment and predict prognosis.Our advice will help clinician to make perfect operation plan.To improve detection rate,this article summarize the research status and progress in ccessory renal artery.