The normal 2-hour postprandial blood glucose should be less than 7.8mmol/l, so the 2-hour postprandial blood glucose of 5.7mmol/l is a normal performance, which indicates that there is no abnormality in postprandial blood glucose, and it has a certain hint for the function of insulin secretion. Postprandial blood glucose value has a certain role in determining the function of pancreatic islet cells, the secretion function is normal, the general blood glucose value will be maintained in a stable state. Under normal circumstances, the blood glucose value of the general population 2 hours after meal is below 7.8mmol/l, the current value is within the normal range. In addition to postprandial blood glucose, fasting blood glucose should also be combined to determine the physical condition, if abnormalities are found, it is necessary to consult a doctor for examination and standardized treatment under the guidance of clinicians to avoid delays in the condition.