Patients with chronic renal insufficiency attach great importance to nutritional therapy, but many patients do not understand the methods of nutritional therapy, which leads to nutritional therapy misconceptions, making the disease more and more serious, diet therapy plus drug therapy is the best, can delay renal insufficiency into it, but must understand the diet therapy, then how to nutritional therapy for renal insufficiency? Nutritional treatment principles a. The supply of potassium and sodium should be flexible according to the patient’s edema and the needs of the condition 1. In cooking, a large amount of water can be used to remove some of the potassium. 2.With the discharge of large amount of water, there will be a large amount of electrolyte loss, which can also lead to hyponatremia, you can take sodium chloride orally or intravenously to replenish sodium. 3. Sodium intake should be reduced, and if there is sodium retention, a salt-restricted diet should be adopted. 2. Limit protein intake and supply as much high quality protein as possible 1. Supplement high quality protein, such as: eggs, milk, lean meat, etc., and evenly distributed in three meals to better play the complementary role of protein. 2.Limit cereal protein (vegetable protein), such as: beans and their products, hard fruits and grains, etc. 3 . Adopt wheat starch (or corn starch) as the main food. 4, can choose any food: potato, white potato, lotus root, water chestnut, yam, taro, pumpkin, vermicelli, lotus root powder, starch, rhizome powder, water chestnut powder, etc. 3. Adequate daily calories must be ensured. 1. If the patient eats less, sugar and vegetable oil can be added to the diet when cooking to meet the calorie intake. 2. Daily calorie intake should be 1500~3000 kcal. The purpose of nutritional therapy is to ensure necessary nutrition, enhance resistance, slow down the development of disease and reduce comorbidities; 2, prevent protein decomposition in the body and maintain the total balance of nitrogen; 3, reduce the retention of blood urea nitrogen.