The foundation of comprehensive diabetes treatment is diet control. As endocrinologists and metabolic physicians, the first and most important thing we do is to educate our patients on how to eat a proper diet to ensure that they have the necessary calories and nutrients for their daily metabolism and that their blood sugar is well controlled. So how much staple food is good for diabetic patients to eat daily? In the early 20th century, before the introduction of insulin, the carbohydrate content in the diabetic diet was extremely low, 9% in 1915, 22% in 1930, 40% in 1950, in the past 50 years, the intake of carbohydrates in the diabetic diet accounted for a gradual increase in the proportion of total calories, especially according to the habits of life in China, carbohydrates accounted for more than 50% to 60% of total calories, diabetic patients can eat more than 200-350g per day. Diabetic patients can consume more than 200~350g daily. Carbohydrate is the main component of the body’s energy supply, and adequate supply can reduce the decomposition of protein in the body and facilitate fat synthesis. In addition, carbohydrates are important substances that constitute the body’s tissues, such as liver glycogen and muscle glycogen, glycoproteins, nucleoproteins, glycolipids in the body all contain sugar. The main organs in the body also cannot live without sugar, such as brain cells at rest need blood sugar to maintain normal function, and 100 to 150g of glucose will be used daily. Staple foods such as rice and noodles are rich in carbohydrates and are also the main source of plant proteins, which are indispensable nutrients for the human body and the most economical and rapid source of supplying calories and proteins, so the staple foods for diabetes should never be restricted too low. Clinical practice has shown that if the patient’s staple food is restricted too low, the patient will be in a semi-starvation state, and the disease will not be satisfactorily controlled. If the daily carbohydrate intake is less than 125g, the body fat decomposition will increase and ketone bodies will be produced, and if insulin is insufficient, ketone bodies cannot be fully utilized, then ketoacidosis will be caused. This shows that the statement “the less staple food intake the better” is too one-sided. So how many carbohydrates are good for diabetics daily? It is generally believed that for patients treated with diet alone, carbohydrate 200g/day at the beginning, if the blood sugar drops after treatment, it can be gradually increased to 250-300g/day; for oral hypoglycemic drugs or insulin injection unstable condition, carbohydrate control at about 200-250g, the condition can be increased to 250-350g after stabilization; for elderly diabetic patients carbohydrate should not exceed 250g, for some reasons can not eat, must enter 150-200 g glucose daily to prevent the occurrence of ketosis.