A double renal pelvis usually refers to the presence of two renal pelvises within the same kidney. Generally the end of the ureteric bud is divided into two branches, which may form double renal pelvis. Double renal pelvis usually does not need special treatment, but patients with double renal pelvis are easy to combine with infection and stones, etc., and more attention should be paid to review clinically. In general, if double renal pelvis exists, duplicated ureter will also exist. If there is no obvious infection or fluid accumulation in double renal pelvis, regular review can be taken to follow up and observe at any time, and there is no need for additional treatment. Congenital double renal pelvis is one of the common malformations of the urinary system. Its formation may be due to a lesion of the renal pelvis, or because when the embryo develops to the 4th week, the cells are not dividing normally during the development in the mother’s body. The appearance of double renal pelvis mainly depends on the development of the individual. Usually, if the patient’s renal function is not obvious abnormalities, regular review of renal function, ultrasound and other related examinations will be sufficient. Meanwhile, patients are advised to develop good habits in life, eat more vegetables and fruits, avoid smoking and drinking, and take proper rest. If the patient found double renal pelvis, it is recommended to go to the regular hospital in time, under the guidance of the doctor to give targeted treatment or treatment.