Surgical treatment of type 2 diabetes refers to gastric diversion surgery for type 2 diabetes. Gastric diversion surgery for type 2 diabetes started out as a complete misstep. In the 1950s, bariatric surgery was used to treat obese patients, and on long-term follow-up, doctors unexpectedly found that obese patients lost significant weight after bariatric surgery and recovered well from the accompanying type 2 diabetes. The cure rate for type 2 diabetes varied widely among the different types of bariatric surgery, with gastric diversion surgery having the highest cure rate and the fewest complications, with a cure rate of about 85 percent. Researchers have also found that obese patients with diabetes who had gastric diversion surgery not only recovered naturally from their diabetes, but also got better faster than they lost weight. At the same time, the complications of diabetes were also improving, and eventually they gradually recovered. Currently, gastric diversion surgery has become an internationally advanced treatment for diabetes; the principle of the surgery is to “short-circuit” the digestive tract so that food no longer passes through the distal stomach, duodenum and part of the upper jejunum. After the surgery, the gastrointestinal hormones are changed, stimulating the islet cells to secrete insulin, and at the same time prolonging the life span of the islet cells and promoting the proliferation of islet cells, restoring the function of the islet, thus achieving the goal of cure. The current “gastric diversion” surgery is a minimally invasive laparoscopic operation, which is simple and quick, and takes only about one hour to operate, with little trauma, quick recovery, and few postoperative complications. In addition to weight loss, the patient’s blood sugar gradually returns to normal about two weeks after the surgery. According to clinical summary, gastric diversion surgery has 8 unique advantages. 1. normal blood sugar after surgery, patients can get rid of lifelong medication or insulin injection; 2. a series of complications caused by diabetes can be recovered; 3. obese patients can lose weight and thinner patients can gain weight; 4. patients with hypertension, hyperlipidemia, fatty liver and other diseases can be improved; 5. the surgery is less traumatic, with fast recovery and fewer complications; 6. patients can resume normal diet; 7. 7.Get rid of the burden of diabetic thoughts and resume normal life; 8. Relatively reduce the economic burden of patients.