2-hour postprandial blood glucose 9.0mmol / L belongs to the high, if not diagnosed with diabetes, the need for timely diet, exercise control, blood glucose control generally does not have serious harm, otherwise it may develop into diabetes; if diabetic patients, 2-hour postprandial blood glucose 9.0mmol / L belongs to the control of glucose up to the standard, the harm is not great, continue to maintain the treatment of lowering glucose. Normal 2-hour postprandial blood glucose should be less than 7.8mmol/L, so 2-hour postprandial blood glucose 9.0mmol/L is high, belongs to the abnormal glucose tolerance but does not meet the diagnostic standard of diabetes; abnormal glucose tolerance patients can be controlled by diet, exercise and other ways to maintain blood glucose in a reasonable range generally does not have serious harm, may return to normal. However, some patients with abnormal glucose tolerance may continue to develop diabetes, and poor long-term glycemic control may induce complications such as diabetic nephropathy and cardiovascular disease, which may seriously jeopardize patients’ health. For diabetic patients, the goal of glycemic control is generally non-fasting blood glucose does not exceed 10.0mmol/L, so 2 hours after meal blood glucose 9.0mmol/L belongs to the glycemic control standard, the harm is not great, you can continue to maintain the treatment of lowering sugar. It is recommended to go to the hospital when abnormal 2-hour postprandial blood glucose occurs.