Fasting blood glucose of 7.7 mmol/L has exceeded the diagnostic criteria for diabetes mellitus, it is recommended to review the glucose tolerance test to further clarify the diagnosis of diabetes mellitus, and based on the results of the test to formulate the next step in the treatment program. If the diagnosis of diabetes mellitus is established, medication must be taken on time, and the recommended medication is metformin. If a simple once fasting blood glucose 7.7mmol / L, glucose tolerance is not abnormal, oral hypoglycemic drugs are not needed for the time being. Actively control the diet, mainly light, eat a variety of fresh vegetables, staple food to coarse grains, small meals, avoid overeating, avoid tobacco, alcohol, beverages, coffee and so on. Actively participate in physical exercise, do not exercise strenuously. Regularly review the blood sugar, so as to achieve early detection, early diagnosis and early treatment.