First of all gastrointestinal surgery for diabetes is now very well defined and is only recommended for patients with type 2 diabetes who meet the criteria for surgery. For type 1 diabetes, gestational diabetes and other specific types of diabetes, surgery is not recommended. According to the American Society for Metabolic and Bariatric Surgery, the efficiency of gastrointestinal diversion surgery for diabetes is 93% to 100%, the cure rate is 83% to 94%, and 63% of hyperlipidemia is relieved, 52-92% of hypertension is cured, and 82% of cardiovascular function is improved. Although this surgery has excellent therapeutic effects and a wider range of indications, it does not mean that all patients can have the surgery, and again certain conditions must be met in order to have the surgical treatment. What conditions need to be met in order to do surgery for diabetes? 1, 1, patient age between 15-65 years old; 2, patient T2DM disease duration ≤ 15 years; 3, patient T2DM type 2 diabetes mellitus with high obesity, BMI>=27kg/m2, should receive early surgery; 4, waist circumference in men > 90cm, women > 80cm is also one of the options for surgical treatment; 5, there are no comorbidities diabetes mellitus prone to large blood vessels and small 6, the patient does not have serious mental disorders, intellectual disabilities; 7, can cooperate with the postoperative diet, lifestyle changes 8, can actively cooperate with the postoperative follow-up, etc. If the above conditions are met, you can consider weight loss surgery, not just weight loss. Weight loss surgery is different from weight loss through diet and exercise, many people think that weight loss surgery is to make diabetic patients lose weight through surgery, so as to achieve the effect of blood sugar control. Yes, weight loss can not only prevent diabetes, but also improve the condition of diabetes, which is the same mechanism as controlling weight through diet and exercise to lower sugar.