Infrarenal calyx stones are a relatively specific type of stone that are located in the lowest part of the kidney. Treatment of infrarenal calyx stones is determined by the size of the stone and specific anatomical factors, including the width and length of the calyx neck and the angle between the calyx neck and the ureter. If the stone is <1 cm, extracorporeal lithotripsy can be performed, but because the infrarenal calyces are located in the lowest part of the kidney, the stone may not be easily expelled after lithotripsy. If the stone is >1cm, it can be treated surgically, and currently, ureteral soft lithotripsy is mostly used to remove the stone. For stones >2cm or if the angle between the neck of the calyx and the ureter is small, percutaneous nephrolithotomy can be used to remove the stones. The specific treatment method needs to be carried out in a regular hospital under the guidance of a urologist.