The normal fasting blood sugar range is 3.9-6.1mmol/L, 1 hour postprandial blood sugar is 6.7-9.4mmol/L, and 2 hours postprandial blood sugar is not more than 11.1mmol/L. The elevated hormone level of pregnant women will lead to changes in blood sugar during pregnancy, which is different from the standard of blood sugar value in non-pregnancy period. 24 weeks is often checked by glucose tolerance test to check the blood sugar of pregnant women, generally The standard values are fasting blood glucose value not more than 5.1mmol/L, 1 hour after meal blood glucose not more than 10.0mmol/L and 2 hours after meal blood glucose not more than 8.5mmol/L. If pregnant women have abnormal blood glucose, it does not necessarily mean that they are diabetic, they can first control it in their diet. First of all, we should choose foods with low glycemic index. For fruits with high glycemic index, such as watermelon, lychee and pineapple, it is not advisable to eat more. In addition, you should not eat candy, honey and other foods with very high sugar content, and eat more fresh vegetables, especially green leafy vegetables. If the blood sugar is still high after dietary adjustment, you need to go to the hospital for appropriate treatment. In addition, pregnant women should regularly monitor the changes of blood glucose values because their blood glucose rises and falls relatively quickly to avoid the adverse effects of blood glucose fluctuations. In addition to the high blood sugar needs to be paid attention to, pregnant women should usually ensure a reasonable and healthy diet, and timely replenish calories when they are hungry after meals, so as to avoid hypoglycemia, dizziness, panic symptoms, and even cause accidents such as falls.