Glycated blood glucose refers to glycated hemoglobin, 6.5% at the same time with “three more and one less” clinical manifestations, can be diagnosed as diabetes. It is recommended to combine with fasting blood glucose, 2-hour postprandial blood glucose and other indicators to comprehensively assess the condition. Glycated hemoglobin reflects the average value of blood glucose in the past three months, and the normal value is 4%~6%. Glycated hemoglobin ≥6.5% is diagnosed when there are diabetic symptoms such as excessive drinking, excessive eating, excessive urination and weight loss. It is also necessary to combine with fasting blood glucose, glucose tolerance test and other tests to comprehensively assess the condition. Patients with high glycosylated hemoglobin are advised to go to the hospital and ask the doctor to make a comprehensive judgment according to the specific situation.