2-hour postprandial blood glucose 17mmol/L may be a little serious, consider diabetes, if diabetes has been diagnosed, then need to adjust the treatment. Normal 2-hour postprandial blood glucose should be less than 7.8mmol/L. If the blood glucose value is between 7.8-11.1mmol/L, it is considered to be abnormal glucose tolerance, and the blood glucose is greater than or equal to 11.1mmol/L, it is considered to be diabetes mellitus. If diabetes has been diagnosed, two-hour postprandial blood glucose is recommended to be less than 10.0mmol/L. A two-hour postprandial blood glucose level of 17mmol/L suggests poor glycemic control, and attention needs to be paid to improving the dietary structure, as well as adjusting the hypoglycemic drugs under the guidance of the doctor. When the examination finds that the blood glucose is higher than normal, it is recommended to consult a doctor in time for treatment under the doctor’s guidance.