Chronic renal failure (CRF) is a clinical syndrome characterized by chronic progressive renal parenchymal damage caused by various reasons, resulting in significant renal atrophy, inability to maintain basic functions, clinical retention of metabolites, imbalance of water, electrolyte, acid-base balance, and systemic involvement. The main causes include primary glomerulonephritis, chronic pyelonephritis, hypertensive renal arteriolar sclerosis, diabetic nephropathy, secondary glomerulonephritis, tubulointerstitial lesions, hereditary renal diseases, and long-term use of antipyretic and analgesic agents and exposure to heavy metals. 1. The etiology of chronic renal failure should be clarified, and it should be clarified whether the renal damage is dominated by glomerular damage, interstitial tubulointerstitial lesions, or renal vascular lesions, so as to provide targeted treatment according to the clinical characteristics. 2. Reversible factors that contribute to the progressive deterioration of renal function in chronic renal failure should be identified, such as infection, drug-induced renal damage, metabolic acidosis, dehydration, cardiac failure, and too rapid or too low a decrease in blood pressure. 3. Attention should be paid to finding certain factors that aggravate the progressive deterioration of renal function in chronic renal failure, such as hypertension, hyperlipidemia, hypercoagulability, high protein dietary intake, and large amount of proteinuria. In order to slow down the progression of renal damage, reduce symptoms, and minimize the complications of chronic renal failure, patients should be put on a low-protein diet from the onset of chronic renal insufficiency, even if the daily protein intake is only 0.6 grams per kilogram of body weight, half of which should be high-quality half of which should be high-quality proteins, i.e., amino acid-rich animal proteins, especially eggs and milk. Specifically, you can eat about 400 grams of staple food (4 taels) per day, eat an egg, do not eat egg yolks containing high phosphorus, 50 grams of lean meat (1 tael), drink 250 grams of milk (5 taels). You can also take the compound alpha keto acid preparation (trade name Kai Tong), 0.12 grams per kilogram of body weight per day. At the same time, in order to prevent malnutrition, it is important to ensure that the patient consumes enough calories, which should amount to 125.4 to 146.3 kilojoules per day. This calorie intake is mainly supplemented by sugar and fats (dairy animal oils). Of course, the patient should also limit salt, (about 3 grams per day). In addition, when potassium is high in the blood, foods high in potassium, such as fruits, fruit juices, and vegetables, should be limited.