For diabetic patients, diet control plays an extremely important role. When it comes to diet control, most people, even clinicians, are more concerned about what not to eat and to eat as little as possible. Diabetic patients are also divided into two main categories, one is not concerned and does not pay attention to diet control at all, then the blood sugar control of this group of people will be more troublesome. Even if the blood sugar level can reach the standard, but also at the cost of a relatively large amount of drugs. The other type of people, the control of the diet is too strict and does not master the method, and even do not eat staple food, the result is that the blood sugar is high and low, fluctuations are relatively large, serious will also cause malnutrition. Both of these approaches are undesirable. For diabetic patients, we should control the diet and do a good job of “subtraction” at the same time, but also to inform patients what they can eat in moderation, and to do a good job of “addition”. The previous “dehumanizing management” of diabetic patients should be changed to “humanizing management”. In short, to control the diet, we have to control it on the premise of ensuring nutrition, not forgetting the most basic purpose of human eating – the intake of nutrition. Therefore, we should control our diet by reducing calories and at the same time pay attention to ensure the intake of various nutrients.