Diabetes is now one of the chronic diseases that seriously threaten human health, among which type 2 diabetes accounts for 85-90% of the total number of diabetes, and the prevalence is increasing year by year, with more than 200 million patients worldwide, and its complications can cause death and disability, seriously threatening the health and life of patients. Type 2 diabetes has always been a medical disease, and the common treatment methods include diet control, exercise, oral hypoglycemic drugs, insulin, etc. However, all of the above medical treatments cannot guarantee that the patient’s blood glucose returns to normal levels and cannot prevent the emergence and further aggravation of various diabetic complications. The emergence of bariatric surgery has brought new hope for diabetic patients. Bariatric surgery first came to lose weight, and after several years of clinical practice, doctors accidentally found that this surgery could effectively treat diabetes. Pories, an American surgeon, found after 14 years of clinical follow-up that metabolic surgery had a cure rate of more than 83% for obese type 2 diabetes. This led to the development of a new treatment modality – weight loss metabolic surgery. It can be said that diabetes surgery is a “beautiful accidental discovery”. Why does bariatric surgery treat diabetes? Gastrointestinal surgery has been developed for 60 to 70 years. Its medical principle is to reduce the intake and absorption of food by changing the gastrointestinal structure so as to achieve the purpose of weight reduction. The change in gastrointestinal structure not only restricts dietary intake and reduces sugar intake, but also changes intestinal flora and hormone distribution in the body, altering pancreatic islet cells, thus achieving a lowering effect on blood sugar. The weight reduction metabolic surgery used to treat type 2 diabetes is a minimally invasive laparoscopic procedure with minimal trauma, less bleeding, faster recovery and relatively few complications. This surgery affects the patient’s endocrine mechanism by changing the flow of food, which ultimately leads to the treatment of type II diabetes, and diabetes complications such as hypertension, obesity and dyslipidemia are significantly improved. Moreover, this method is superior to the effect of drug hypoglycemia, and patients can solve the problem of high blood sugar without having to inject insulin after the procedure, not to mention taking multiple drugs. In other words, the general traditional oral hypoglycemic drugs or insulin injections can only temporarily stabilize blood sugar, and in order to achieve the purpose of sugar control, one has to take medication for a long time and be controlled by drugs and insulin for life. Weight loss metabolic surgery can achieve long-term sugar control because it fundamentally solves the problem of food intake and absorption, plus the change of intestinal flora after the surgery, which can well regulate endocrine. Not only does surgery help with blood sugar improvement, but according to a follow-up survey through patients, patients who underwent surgery had significantly better glycemic control than non-surgical treatment within 1 to 5 years after surgery, and their bodies benefited more. In other words, while traditional oral hypoglycemic drugs or insulin injections can generally only control blood sugar elevation and delay the onset of vascular and neuropathy, diabetes surgery offers the possibility of a long-term treatment without medication and insulin blood sugar levels remain normal. Of course, depending on the patient’s individual situation, the kind of expected results that may be achieved will certainly be different. Whether the surgery can be done or not can only be determined after a pre-operative examination and evaluation. After that, you can work with the weight loss and glucose reduction team to find out the most suitable surgical plan for you.