Chronic renal insufficiency is a very common chronic disease, with a prevalence of 10.8% among people over 40 years old in China, which is a very high incidence. Chronic renal insufficiency is a very insidious disease, and most of them have no symptoms in the early stage. When chronic renal insufficiency is found, we should pay attention to providing sufficient calories, high quality and low protein, and a balanced diet of potassium, phosphorus, sodium and vitamins in our diet. In terms of energy, patients with chronic renal insufficiency should be provided with 30kcal of calories per kilogram of body weight per day, and a high quality low protein diet should be provided. for patients with chronic renal insufficiency in stage I-II, the daily protein intake should be 0.8g per kilogram of body weight. when entering stage III, the protein supply should be reduced to 0.4-0.6g per kilogram of body weight for patients with chronic renal insufficiency. protein Source, it is recommended to provide high quality protein, which should account for more than 1/2-2/3, which is very important for patients with chronic renal insufficiency. The main sources of high quality protein are poultry, fish, meat, eggs and milk from animal protein, and soy protein from vegetable protein. For the supply of fat, patients with chronic renal insufficiency must have a low-fat diet and try to consume vegetable oils instead of animal oils. Cholesterol intake should also be minimized, and animal liver and egg yolk should be consumed as little as possible. For patients with chronic renal insufficiency, it is also very important to maintain a balance of minerals. When patients are deficient in vitamin D, they should also take vitamin D. If patients have hyperkalemia, anuria and oliguria, they should try to reduce the intake of potassium-rich foods, such as fresh vegetables and fruits that are high in potassium. When chronic renal insufficiency enters stage III, the amount of phosphorus provided should also be reduced, generally it must be below 800mg per day, and patients should try to eat less or no animal liver, egg yolk and other foods with high phosphorus content. For the supply of sodium, many patients with chronic renal insufficiency have hypertension, and it is recommended that the patient’s sodium intake should be within 5g.