Diabetes is nowadays our common endocrine metabolic disease, and its prevention and treatment are usually preferred to lifestyle interventions, and how do vegetables, as a necessity in life, affect diabetes? Studies have shown that an adequate intake of vegetables is beneficial for the prevention and control of diabetes by reducing the risk of metabolic syndrome; most fresh vegetables have a low glycemic index, glycemic load and energy density, so by what mechanisms do vegetables contribute to the stabilization of human blood glucose? First, the nutrients in vegetables that may have a positive effect on the prevention of type 2 diabetes include a variety of antioxidants, dietary fiber, potassium, magnesium, etc. These nutrients, alone or in combination, are not only beneficial in reducing the risk of diabetes, but may also have a positive effect on the prevention of diabetes complications. Secondly, the flavonoids, carotenoids, vitamin E, vitamin C and other antioxidant substances in vegetables can help remove a variety of free radicals generated during the metabolic process in the body, reduce oxidative stress damage to pancreatic beta cells, thus contributing to the maintenance of blood sugar stability. Three, onions onions contain S a methyl cysteine sulfoxide has a hypoglycemic, hypolipidemic effect, onions also contain sulfonylurea butyric acid, which can play a hypoglycemic role by promoting the use of sugar in cells. Onions also have the effect of lowering blood lipids, reducing blood viscosity and improving atherosclerosis, and can prevent cardiovascular complications of diabetes when consumed regularly. American scientists also found that onions contain prostaglandin A, prostaglandin A can reduce human peripheral vascular resistance, lower blood pressure, and can increase renal blood flow and urine volume, to promote sodium and potassium excretion, which can help prevent kidney complications of diabetes. Fourth, lettuce lettuce is rich in niacin, niacin is an insulin activator, often eaten to prevent diabetes is helpful. Lettuce can stimulate gastrointestinal motility, on the diabetes-induced gastric diplegia and constipation has an auxiliary therapeutic effect. Lettuce contains 27 times more potassium ions than sodium ions, which can promote urination and lower blood pressure. However, to avoid losing a lot of water-soluble vitamins, it should be washed and then cut; lettuce leaves have higher nutritional value than stems and should be eaten with stems and leaves; to avoid damaging the ascorbic acid contained in lettuce, it is not advisable to store or cook lettuce in copper utensils. In addition, sugar lovers can also choose vegetables such as winter melon, cucumber, spinach and bamboo shoots according to their dietary habits. These vegetables are not only low in sugar, but also contain some ingredients that are helpful in preventing diabetes and its complications; mushrooms are high-protein, low-fat foods that also have a role in lowering blood sugar and blood lipids; tomatoes are low in sugar and have a role in preventing and fighting cancer. There are many varieties of vegetables, different colors of vegetables contain different nutrient characteristics, nutritional value also varies greatly, although the above vegetables have a hypoglycemic effect, but sugar lovers should choose different kinds of vegetables, sugar lovers in the choice of different varieties of vegetables how to match more conducive to health? In order to facilitate diabetic patients to quickly grasp the methods and techniques of dietary control, especially the selection and matching skills of vegetables, some researchers have proposed the “321 vegetable model”. The “321 vegetable model” means that three different vegetables should be selected for Chinese food or dinner, and the vegetable intake should reach 30 grams per meal, and six different vegetables should be consumed throughout the day, with a gross weight of about 600 grams. The “321 vegetable pattern” in the “3” refers to 3 two leafy vegetables, mainly green leafy vegetables, including cabbage, rape, cabbage, spinach, amaranth, chrysanthemum, etc.; “2” refers to 2″ refers to 2 taels of any other vegetables, excluding potatoes, yams, groundnuts, roots, taro, etc. “1” refers to 1 tael of mushrooms and algae, including mushrooms, shiitake mushrooms, enoki mushrooms, seaweed, nori, black fungus, etc. Vegetables can be cooked in various ways, but raw is the best way for sugar lovers to eat vegetables. On the one hand, raw vegetables can reduce the loss of vitamins in vegetables; on the other hand, vegetables cooked in oil and salt will increase the content of oil and salt, and sugar lovers do not have these concerns when eating vegetables raw. But not all vegetables are suitable for raw food, suitable for sugar lovers to eat raw vegetables are: carrots, cucumbers, tomatoes, persimmon peppers, lettuce, cabbage, cabbage, cauliflower, peppers, onions, celery and so on. Raw food methods in addition to making salads, but also homemade fresh vegetable juice or fresh vegetables cold. In summary, eating more vegetables can improve glycemic control, improve hypertension and lower blood lipids, thus reducing the risk of comorbidities. Finally, it should be pointed out that no matter which vegetables are consumed, they should only be used as an adjunctive therapy, and the necessary daily physical exercise and medication should not be neglected.