The blood glucose level of diabetic patients may vary according to their individual body constitution, but most diabetic patients’ fasting blood glucose level fluctuates between 3.9-7.1mmol/L, type 1 diabetic patients’ postprandial blood glucose level fluctuates between 6.7-9.1mmol/L, and type 2 diabetic patients’ blood glucose level fluctuates between 5.7-8.5mmol/L. Whether it is type 1 or type 2 diabetes, once the blood glucose level exceeds the above range, it should be taken seriously. Once the above range is exceeded, it is necessary to pay attention to it and consume low-sugar and low-calorie food in daily life, and do more aerobic exercise, reasonable diet and moderate exercise to reduce the incidence of diabetes. Diabetes can bring many adverse effects to the human body, often causing weakness, lack of concentration, memory loss, itchy skin and other adverse symptoms, and in serious cases can also induce cardiovascular disease, need to pay attention to and actively treat.