For undiagnosed diabetics, a 2-hour postprandial blood glucose of 10.9 mmol/L is considered high, which belongs to impaired glucose tolerance, but has not yet reached the diagnostic criteria for diabetes; for diabetics, a 2-hour postprandial blood glucose of 10.9 mmol/L usually belongs to the control of sugar does not meet the standard, but it is necessary to set the goal of glycemic control according to their own situation. 2-hour postprandial blood glucose <7.8mmol/L is normal; 7.8 ~ 11.1mmol/L is impaired glucose tolerance; more than 11.1mmol/L and typical symptoms should be diagnosed as diabetes. Therefore, although the 2-hour postprandial blood glucose 10.9mmol/L is considered high, it belongs to the pre-diabetic stage, and timely intervention is likely to return to normal. For diabetic patients, non-fasting blood glucose control target is generally no more than 10.0mmol / L, 2 hours after the meal blood glucose 10.9mmol / L belongs to the control of sugar does not meet the standard, but also need to formulate the control of sugar target according to their own situation, especially the elderly or basic conditions of the patient is not good, can be appropriately relaxed control of the sugar standard in order to prevent the occurrence of hypoglycemia reaction. If the blood glucose level is higher than normal, you should consult a doctor in time to clarify the cause of the disease and carry out treatment under the guidance of the doctor.