Drinking black tea drinking kidney failure is not true. Black tea is a fully fermented tea, containing caffeine, can improve the excitability of the nerves, so that people are mentally active, to improve learning, work efficiency has a certain role, but for insomnia patients, it is not recommended to drink before going to bed; black tea is relatively mild, less irritating to the gastrointestinal tract, for the elderly is also a relatively good drink. Common causes of renal failure are various glomerulonephritis, diabetic nephropathy, hypertensive nephropathy, urinary system obstruction, diarrhea, gastrointestinal bleeding, heart failure, drug damage, etc. Drinking black tea generally does not lead to renal failure. It is recommended that patients with renal failure to the regular hospital in a timely manner, to identify the causes, and follow the doctor’s instructions for standardized treatment.