What is the purpose of nutritional therapy for chronic kidney disease? (1) Delay the progression of kidney disease and delay the start of dialysis. (2) To improve the nutritional status and increase the survival rate. (3) To reduce toxins in the body, alleviate clinical symptoms and improve quality of life. (4) Correct various metabolisms and reduce complications. What are the principles of nutritional therapy for chronic kidney disease? (1) Limit the intake of protein in the diet and try to increase the proportion of high-quality protein to at least 50%-70% of the total amount (2) Caloric intake should be sufficient, with a total caloric intake of 30-35 Kkal/Kg body weight per day. (3) High-quality protein food should be distributed equally to three meals as far as possible, which can reduce the burden on the kidneys and ensure better absorption and utilization by the body. (4) The supply of inorganic salt in the diet should be adjusted in time with the changes of the disease. If blood potassium rises and urine output decreases (below 1000ml/day), it is required to restrict foods with high potassium content appropriately. (5) Calcium supplementation, 1000-1500mg of calcium per day, while limiting the intake of phosphorus. (6) Vitamin supply should be adequate. (6) When there is a decrease in urine output and edema, appropriate restriction of water intake is required.