Minimally invasive surgery for urinary stones takes about half an hour to two hours to perform, and needs to be estimated in relation to the size of the stone, the type of surgery, and the method of lithotripsy. Generally speaking, for patients with small stones, uncomplicated lithotripsy and little difficulty in surgery, the fastest surgery can end in about half an hour. If the stone is large, the corresponding operation time will definitely be extended; in addition, if the percutaneous kidney surgery is used, the operation time will also be extended because the patient usually needs to change the position during the operation; at the same time, if ultrasonic suction lithotripsy is used, the operation time is usually shorter, and if laser powder lithotripsy head is used, the operation time is usually longer. Although minimally invasive surgery is less risky, current research and practice has proved that the risk of ureteral stenosis and bleeding in patients increases significantly when the surgery lasts more than 2 hours. Therefore, the maximum duration of minimally invasive surgery for stones in China is currently around 2 hours, and most of the patients choose to undergo another surgery in phase II if the stone cannot be completely removed within 2 hours. The specific operation time varies depending on the patient’s condition and intraoperative situation, and it is recommended to follow the physician’s advice before and after the operation.