The patient underwent right nephrectomy for right kidney tuberculosis 6 years ago, and sigmoid bladder enlargement and left ureteral transplantation with ureteral transplantation to the new bladder were performed 5 years ago.The patient was admitted to the hospital in March and May 2014 due to left lumbar discomfort and oliguria, and the abdominopelvic CT did not show any obvious signs of ureteral stone, and the patient was discharged from the hospital after his urinary output was back to normal.The patient was diagnosed with a left ureteral stone at the local hospital in November 2014, and was treated with an extracorporeal shock wave lithotripsy. After extracorporeal shock wave lithotripsy, anuria appeared, and uremia gradually appeared, and he was admitted to our hospital for emergency left nephrolithotomy, and left ureteral exploration was carried out 1 week after the operation, and after removing the left nephrostomy tube during the operation, the left nephrostomy channel was lost, and he failed to successfully explore the ureter. After the operation, the patient’s urine output returned to normal and his renal function gradually improved, and he was discharged from the hospital. More than 10 days after discharge, the patient was again anuric and uremic, and he underwent left nephrostomy as an emergency, and he could urinate on his own after nephrostomy. He was admitted to the hospital 18 days after the left nephrostomy on medical advice. After admission, the patient was considered to have recurrent oliguria, anuria, currently considered to be caused by left ureteral stone, anuria can urinate on its own after nephrostomy, the condition was suspenseful, and the indication for re-exploration was clear, the left ureter was transplanted in the intestinal wall of the neobladder, the intestinal wall has more folds, and the position is high, and the retrograde exploration was difficult. The loss of the nephrostomy channel in the previous operation may be related to the small size of the nephrostomy channel and the compression of the nephrostomy channel by abdominal organs. The patient had an isolated kidney with hypertrophied parenchyma, rich blood supply, and an unknown ureter, which made reoperation extremely difficult and stressful. During the operation, the patient took the right oblique supine lithotomy position, removed the nephrostomy tube, from the nephrostomy channel and urethra combined application of ureteral rigid mirror, soft mirror and choledochoscope for ureteral exploration, the exploration saw the lower part of the ureter, a yellowish-brown stone of about 0.6*0.5cm in size, the stone was hard, and the distal end of the stone had obvious narrowing of the ureter. Holmium laser was used to pulverize the stone through nephrostomy channel and Amplatz dilator was used to dilate the narrowed section of ureter from urethra under the direct vision of soft microscope and double “J” tube was built into the ureter. The operation went smoothly and the patient was discharged from the hospital 2 days after the operation.