Whether a 2-hour postprandial blood glucose of 8.9 mmol/L is serious needs to be judged on a case-by-case basis. If it is glucose tolerance abnormality, the situation is relatively not serious, but need to pay attention; if it is diabetes, the situation is relatively serious. The normal range of 2-hour postprandial blood glucose should be less than 7.8mmol/L. 2-hour postprandial blood glucose 8.9mmol/L exceeds the normal range, belonging to the pre-diabetic stage, the situation is relatively not serious, but need to pay attention. It is suggested that patients should pay attention to dietary adjustments, eat less high-sugar, high oil, high-calorie food; pay attention to weight management, and adhere to aerobic exercise every day. 2-hour postprandial blood glucose 8.9mmol / L, coupled with the typical symptoms of diabetes mellitus, it is recommended to improve the fasting blood glucose and glucose tolerance test, etc., if the fasting blood glucose is also more than 7mmol / L, it is necessary to consider the occurrence of diabetes mellitus, the situation is relatively serious, in addition to dietary control and exercise, if necessary, the use of Raglanide tablets, metformin hydrochloride tablets and other drugs to control blood glucose. It is recommended that patients with 2-hour postprandial blood glucose 8.9mmol/L go to the hospital in a timely manner, by the doctor’s guidance on specific glucose-lowering program, patients also need to monitor blood glucose on a regular basis, to keep abreast of changes in blood glucose data.