It is necessary to pay attention to a reasonable and scientific diet for the treatment of renal failure, both in daily life and before and after the examination or treatment of renal failure. The diet of renal failure must draw the attention of patients to live a healthy life. Two low i.e. low protein diet and low phosphorus diet. It is now believed that LPD is more beneficial to start early than late for the protection of renal function. When the endogenous creatinine clearance (Ccr) is around 55ml/min, a low protein diet LPD (0.8g/kg/d) should be given, along with sufficient calories; when Ccr is less than 55ml/min, the daily protein intake should not be greater than 0.6g/kg/d. Protein should be mainly high quality protein intake. Low phosphorus diet means that phosphorus in the diet is limited to 0.8-1.0 g/d. Phosphorus is mainly contained in protein, which is naturally obtained from low protein diet in a sense. Reasonable protein intake in renal failure, light diet 1, reasonable control of protein intake is to meet the basic requirements of the patient’s body for protein, minimize the intake of protein, mainly high-quality protein, such as fish, lean meat, etc., cautiously eat vegetable protein classes such as soy milk, tofu, etc. 2, light diet: especially edema, hypertension patients should be low salt diet; reduce the intake of high cholesterol and high saturated fatty acid content of food such as animal protein. The “three high” diet for renal failure is a high-calorie, high essential amino acid, high vitamin diet. In order to maximize the use of non-essential amino acids in the body to synthesize protein and reduce protein breakdown in the body to reduce azotemia, adequate calories should be supplied. A very low protein diet (0.3~0.4g/kg/d) with essential amino acids (EAA) can significantly reduce renal load and urinary protein excretion. There are many studies showing that the progression of chronic renal failure is significantly slowed by VLDP + α-keto acid treatment. A diet rich in vitamin C, B vitamins, vitamin D and high fiber is suitable for patients with chronic kidney disease. Proper vitamin and mineral supplementation to control the diet is an essential treatment for patients with chronic renal failure. Good dietary management can delay the progression of chronic kidney disease and delay entry into dialysis, improving patients’ quality of life and extending life expectancy. Avoid high potassium and high purine foods in renal failure 1. Be careful with high potassium foods: such as bananas, oranges, MSG, soy sauce, potatoes, squash, mushrooms, fungus, nori, dates, lotus seeds, almonds, ham, dried scallops, shrimp, etc. 2, avoid high purine food: such as animal offal, seafood, spinach, mushrooms, etc., beer, etc. 3.Be careful with all kinds of health care products.