The blood sugar of 11.9mmol/L two hours after meal is high, the venous blood sugar of normal people two hours after meal is not more than 7.8mmol/L, if it is more than 11.1mmol/L, the diagnosis standard of diabetes is reached, but the diagnosis cannot be determined by the blood sugar value only once. The main factors of high postprandial blood glucose are diet and exercise. If you want to reduce postprandial blood glucose, you should control it in your diet, don’t eat porridge, rotten noodles and food with filling such as buns and dumplings, avoid fried and deep-fried food and thickened food, control the intake of carbohydrates, don’t exceed two taels of staple food per meal, don’t exceed one or two taels of protein food such as chicken, fish, meat, eggs and milk, don’t eat peanuts and Do not eat peanuts, melon seeds and other nuts, and avoid adding meals to the main meal. Exercise for 0.5-1 hour after each meal, exercise can effectively reduce postprandial blood sugar. If the postprandial blood sugar still cannot reach the standard based on strict diet and exercise control, we should consider adding glucose-lowering drugs or insulin for treatment.