Post-meal blood glucose generally refers to the 2-hour postprandial blood glucose, whether it is a normal person, a pregnant woman or an ordinary diabetic patient, postprandial blood glucose 7.1mmol/L is normal. In normal people, 2-hour postprandial blood glucose is less than 7.8mmol/L, which is the normal level. In case of pregnant women, the 2-hour postprandial blood glucose value should be less than 8.5mmol/L, so the 2-hour postprandial blood glucose 7.1mmol/L is normal. If the patient is diabetic, the 2-hour postprandial blood glucose control at 7.1mmol/L is also in the normal state. If the patient is an elderly person, this blood glucose value needs to be paid attention to. Because the elderly body’s response is slow, whether it is insulin secretion, or glucagon response, slower than the normal population. If the blood glucose control is low, especially close to the normal value, hypoglycemia is prone to occur and should be highly attention. Keeping blood glucose control basically on target in diabetic patients is one of the most important ways to ensure that patients have fewer complications and a better quality of life. If blood glucose control is poor, patients are prone to diabetic ketoacidosis, lung infections, urinary tract infections and skin infections. Thus, patients need to monitor their blood glucose regularly to avoid exceeding normal values.