Pu-erh tea is rich in oxalic acid, long-term consumption of large quantities will aggravate the calcium oxalate type of kidney stones; people with kidney stones should drink more water and regulate their diet to avoid aggravating their condition. Kidney stones belong to the upper urinary tract stones, usually urinary tract stones are formed by a mixture of salts, calcium oxalate stones are the most common, followed by phosphate, urate, carbonate. Pu-erh tea is rich in oxalic acid, and drinking large quantities over a long period of time is likely to produce calcium oxalate stones, or make the original calcium oxalate stones increase in size. People with kidney stones should first drink more water in their diet to dilute the concentration of stone-prone substances in the urine by increasing the volume of urine and reducing crystal deposition. Regulate the diet to maintain a comprehensive balance of dietary nutrients, oxalate stone patients should limit the intake of strong tea, spinach and so on. Avoid high salt diet and excessive intake of protein, increase the intake of vegetables, fruits and other fiber. In summary, people with kidney stones should not drink a lot of Pu’er tea, so as not to aggravate the calcium oxalate kidney stones, should consult a doctor in a timely manner, and follow the doctor’s instructions for standardized treatment.