How much normal blood glucose at 11 p.m. is related to the time of dinner eating, if it belongs to 3~4 hours after meal, it can be measured according to the normal range value of fasting blood glucose, which should be between 3.9~6.1mmol/L; if it belongs to 2 hours after meal, then the blood glucose should be less than 7.8mmol/L. Glucose is an important nutrient and one of the main sources of energy in the human body, and the production and utilization of blood glucose in normal people are in a state of dynamic balance. In general, the normal blood glucose range can be divided into fasting blood glucose and postprandial blood glucose, of which the fasting blood glucose is 3.9~6.1mmol/L, and 2 hours after meal within 7.8mmol/L. If the blood glucose exceeds 7.8mmol/L, the blood glucose should be less than 7.8mmol/L. If the 2-hour postprandial blood glucose is more than 7.8mmol/L and not more than 11.1mmol/L, it may be abnormal glucose tolerance; if it is more than 11.1mmol/L, it suggests that one may have diabetes. For those who have abnormal blood glucose monitoring, it is recommended to go to the hospital in time for examination.