At present, people are most concerned about the advantages of minimally invasive surgery. Compare the advantages of minimally invasive surgery with those of open surgery: Minimally invasive surgery features: 1, small trauma: no incision can be seen on the patient or only an incision less than 1cm long, while open surgery will leave a wound of 15-20cm; 2, fast recovery, minimally invasive surgery can be out of bed on the same day or the second day, unlike open surgery, which requires bed rest after surgery 3-5 days or longer to move around. Minimally invasive surgery often does not require blood transfusion because of the small damage and low bleeding. Drinking more water is a simple way to prevent urinary tract stones. Indications for minimally invasive percutaneous nephrolithotomy: 1, all stones requiring open surgical intervention, including single and multiple stones, deerstalker stones; 2, residual and recurrent stones after open surgery; 3, symptomatic stones in small calyces or intraperitoneal stones; 4, stones that cannot be crushed by extracorporeal shock wave and failed to be treated; 5, large stones with heavy upper ureteral obstruction or diameter >1.5 cm; 6, large stones with diameter >1.5 cm. 6.Ureteral polyp encapsulation and ureteral tortuosity, invalid extracorporeal shock wave lithotripsy or failed ureteroscopy; 7.Kidney stones in special patients: including: kidney stones in pediatric and obese patients; kidney stones combined with stenosis; isolated kidney combined with stone obstruction; horseshoe kidney combined with stone obstruction; kidney transplant combined with stone obstruction; non-atrophic kidney, non-hydronephrosis kidney, infected stones.