Normal blood glucose concentration two hours after dinner should be less than 7.8mmol/L. Blood glucose two hours after dinner refers to the blood glucose concentration two hours after the first bite of food, and the normal range should be less than 7.8mmol/L. If the blood glucose two hours after meal is at 7.8~11.1mmol/L, it may be hypoglycemic, and the blood glucose two hours after meal is more than 11.1mmol/L, which is considered as diabetes mellitus. Normal people should also maintain a healthy diet in their daily life, avoiding foods high in sugar and fat, such as cakes, milk tea, animal offal and fried foods. If there is any blood glucose abnormality, it is recommended to go to the hospital for consultation.