Diabetes mellitus postprandial blood glucose 13.5mmol / L belongs to the high blood glucose, beyond the diabetic patients blood glucose control goals, need to actively control blood glucose through diet, exercise, drugs and so on. 1. Diet: diabetic patients need to strictly control the daily total calorie intake, the diet should be balanced with, avoid greasy, high salt and high sugar foods, appropriate intake of high dietary fiber foods, eat more coarse grains, avoid overeating. 2. Exercise: Regular exercise can reduce weight and improve insulin sensitivity. It is recommended to have no less than 150 minutes of aerobic exercise per week, including swimming, jogging, walking, cycling, etc. Exercise should be in moderation and should be persisted for a long time. 3. Drugs: glucose-lowering drugs can choose metformin, acarbose, insulin, etc., the drug should be used under the guidance of a doctor. Diabetic patients with postprandial blood glucose 13.5mmol / L, should consult a professional doctor to adjust the sugar-lowering program.