The diagnosis standard of diabetes is fasting blood glucose greater than or equal to 7.0mmol/L, or 2 hours after meal blood glucose greater than or equal to 11.1mmol/L, and accompanied by typical diabetes symptoms, such as thirsty and drink more, eat more easily, weight loss, increased urination and other symptoms, blood glucose is the only criterion to diagnose diabetes. Diabetic patients must strictly control their diet, increase exercise, keep a calm mind and develop good habits. It is necessary to reasonably use oral hypoglycemic drugs or insulin injection treatment to keep fasting blood sugar below 6.1mmol/L and 2 hours after meal blood sugar below 7.8mmol/L so that no complications will occur or delay the occurrence of complications.