Calcium oxalate kidney stones are relatively common kidney stones. Due to the presence of excessive oxalic acid in the body and high concentration of calcium in the urine, calcium oxalate stones will gradually form, which are hard and can be removed from the body by extracorporeal shock wave lithotripsy or surgery. Stone formation is a long-term slow process, when the food is rich in oxalic acid or excessive calcium supplementation, it will increase the urinary calcium excretion rate, and at the same time increase the concentration of oxalic acid in the urine, over time, it is easy to form calcium oxalate stones. Long-term large amounts of non-drinking water can lead to the concentration of urine, which can cause the concentration of calcium oxalate in the body is too high, so the precipitation of calcium oxalate crystals, and gradually form calcium oxalate stones. In addition to extracorporeal shock wave lithotripsy and surgery, it is necessary to reduce the intake of oxalic acid-rich foods and unnecessary calcium supplementation in daily life, and to drink more water to keep the urine from becoming concentrated, which can lead to further stone formation.