Tea only has a slight role in controlling blood sugar, can not replace the drug to treat, often drink tea including black tea, green tea, white tea, pu-erh tea, etc., as follows: 1, black tea contains tea polyphenols, have a slight promotion of insulin secretion effect. For patients with insulin function, drinking black tea has a slight hypoglycemic effect; 2, green tea for obese patients, there is heat, diuresis, weight loss, can bring about the improvement of blood lipids and body weight, through the improvement of blood lipids and body weight, it is possible to improve the insulin resistance, so as to improve the control of blood glucose; 3, white tea contains tea polyphenols, tea polysaccharides and other components, which can not only promote insulin secretion, but also may inhibit the Post-prandial blood glucose increase, blood sugar control is also helpful; 4, drinking tea can be appropriate to add some Chinese medicine, qi and yin deficiency patients can add some beneficial qi and yin nourishing Chinese medicine, such as astragalus, Pueraria lobata, maitong. Patients with Yin deficiency and internal heat can add some honeysuckle and chrysanthemum, which can help control blood sugar.