The treatment of multiple stones in both kidneys is as follows: 1. If the volume of stones is less than 2 cm and there is no fluid in the kidneys, extracorporeal shock wave lithotripsy is recommended. First, choose the side with easy stone discharge or the side with small stone volume for extracorporeal shock wave lithotripsy, wait for the stones on one side to be discharged, and then deal with the stones on the opposite side of the kidney. 2. If multiple stones in both kidneys are combined with hydronephrosis, which has caused some damage to the kidney function, surgery is recommended, either ureteroscopic Holmium laser lithotripsy or percutaneous nephrolithotripsy Holmium laser lithotripsy treatment. It is recommended to choose the side with relatively more fluid, which is easy to puncture, or to choose the side with smaller stones. After treatment of stones on one side, surgery is recommended to treat the stones on the opposite side of the kidney at a later date.3. If both kidney stones are combined with ureteral stones, it is recommended to treat ureteral stones first and then kidney stones at a later date.4. After surgery or extracorporeal shock wave lithotripsy, regular follow-up ultrasound or CT is required to understand the stone removal situation, and it is recommended to stop the follow-up until the stones are clean to avoid obstruction caused by stones discharged into the ureter. It is recommended to stop the review until the stone is clean to avoid obstruction caused by stone discharge into the ureter, which may lead to hydronephrosis and further damage to kidney function.