Diet therapy is the basic treatment for diabetic patients, diabetic patients should control diet and reasonable diet, the purpose of controlling diet: 1, correct metabolic disorders, metabolic disorders in diabetic patients can be controlled by diet, reasonable diet to achieve the purpose of controlling blood sugar, blood lipids, compensate for the lack of protein and other nutrients. 2, reduce the pancreatic islet load, control diet can make the pancreatic islet cells get rest, part of the function 3.It is beneficial to lose weight and maintain healthy weight, obesity is a risk factor of diabetes, control diet can promote its own consumption, reduce excess fat, help to enhance insulin sensitivity, reduce blood lipids and reduce the risk factors of cardiovascular disease. 4.Lower postprandial blood glucose, control diet can lower postprandial blood glucose, feedback to reduce the stimulation of pancreatic islets, which is beneficial to the recovery of pancreatic islet function. 5.It can Make good control of blood sugar, reduce the level of glycated hemoglobin, can delay and stop the occurrence and development of diabetic complications. 6.Improve the overall health level, under the premise of ensuring normal growth and development to improve, consume more than the intake of nutrition, promote the growth and development of adolescents, to meet the increased metabolic needs of pregnant and lactating women, and to ensure adequate physical strength of diabetic patients.