Patients with high blood sugar can eat sweet potatoes, but should be eaten in small amounts. Sweet potatoes are rich in vitamins, amino acids, dietary fiber, pectin, carbohydrates and other nutrients, which have the effect of enhancing gastrointestinal peristalsis and promoting defecation. Diabetic patients can eat a small amount of sweet potato, is conducive to replenish the body’s required nutrients. However, although sweet potatoes are delicious, they need to be consumed in small amounts because the GI value of sweet potatoes (boiled) is 76.7, which is a high GI value food, and consuming large quantities of sweet potatoes may lead to fluctuations in blood glucose, which is not conducive to the control of the condition of the patient. In daily life, patients are advised to choose a low-salt, low-fat, low-sugar diet, and to check their blood glucose regularly, and go to the hospital if their blood glucose value is abnormal.