The fastest way to lower sugar in diabetes is to apply insulin, but in clinical practice it is not advocated to lower sugar too fast, but gradually, otherwise it will cause uncomfortable reactions in patients. In addition, diabetes is a chronic disease that requires a long-term stable blood glucose standard, and lifelong treatment with diet, exercise and medication. In the case of type 1 diabetes or diabetes with poor pancreatic function, insulin needs to be used for lifelong glucose-lowering treatment. In the whole process of glucose lowering, it is necessary to cooperate with diet and exercise, to have a balanced diet, a light diet, to control the total calories eaten, to keep exercising, and to try to exercise for half an hour after each meal, and not less than 150 minutes per week, and to be persistent. Only in this way can we make the blood sugar reach the standard smoothly for a long time and prevent the occurrence of complications.