The principle of understanding what patients can and cannot eat is necessary to help patients recover smoothly. 1, protein intake to high biological value of high-quality protein, such as milk, eggs, meat, etc. to increase. 2, low salt, low phosphorus, high calcium diet. Those who cannot eat follow the doctor’s instructions for intravenous supplementation. 3, lean meat, fish, chicken, etc. Food with high sugar content: such as honey, glucose, sweet fruit juice, etc. 4, it is appropriate to use vegetable oil, but not limited to fat intake of renal insufficiency diet how to master the principles.