The main principle of dietary treatment for patients with chronic renal failure: reduce the burden on the kidneys and prevent malnutrition. The main points include the following: 1, high-quality protein diet: a, chronic kidney injury, renal function is normal: high-quality protein diet 0.8 ~ 1g/kg・d. b, chronic kidney injury, renal function is abnormal (non-dialysis): high-quality low-protein diet 0.6 ~ 0.8g/kg・d + essential amino acids or α-ketoacid (Kaito). c, chronic kidney injury, renal failure (dialysis): high-quality low-protein diet 0.8 ~ 1g/kg・d. c. Chronic kidney injury, renal failure (dialysis): high-quality protein diet 0.8～1g/kg・d+essential amino acids or α-keto acid (Kaito). 2. Low salt diet: about 3g/day. 3.Low potassium diet: less bananas, grapes, beans, tofu skin, mushrooms, kelp, eel, meat floss and so on. 4, low phosphorus diet: eat less yeast, mushrooms, pumpkin seed kernels, nuts, shrimp and fish, animal offal and so on. 5.Appropriately limit the amount of water intake (edema).