Normal glycosylated hemoglobin ranges from 4.0% to 6.0%, and diabetic patients generally need to be controlled below 7%. Glycated hemoglobin is formed by combining hemoglobin and glucose in red blood cells. Because the half-life of red blood cells is 120 days on average, its value can reflect the average level of blood sugar in the human body in the past 8 to 12 weeks, which is closely related to the human body’s blood glucose concentration and the control of diabetic patients’ condition, and the normal range of glycated hemoglobin is 4.0% to 6.0%. For diabetic patients, the goal of glycemic control is generally glycated hemoglobin below 7%, fasting blood glucose 4.4mmol/L to 7.0mmol/L, non-fasting blood glucose does not exceed 10.0mmol/L, but also according to the individual situation to set the goal of glycemic control. In case of abnormal glycosylated hemoglobin, it is recommended to consult a doctor in time to improve fasting blood glucose, postprandial blood glucose, glucose tolerance and other related tests, and follow the doctor’s instructions for treatment.