Weight loss surgery to control weight and treat metabolic syndromes such as obesity and diabetes has become a consensus in the medical community and is accepted by the majority of obese diabetic patients, and with the increasing awareness of bariatric surgery, more and more patients are undergoing bariatric surgery to treat obesity and diabetes as well as sleep breathing disorders and polycystic ovarian infertility. There are more and more ways of bariatric surgery, but at present, the most popular choice is laparoscopic gastric bypass and sleeve gastrectomy. It requires consideration of your lifestyle, specific causes of obesity, medical conditions, and family history of stomach cancer, as well as your own acceptance of gastric resection, etc. Gastric bypass surgery has been the gold standard for weight loss and metabolic surgery because of its reliable weight loss results and almost all complications can be prevented, being able to reduce 60-70% of excess body weight, and the relief of type 2 diabetes can reach about 80%. In addition, the operation leaves the distal stomach open, so it is difficult to examine the open stomach after the operation, and gastroscopy cannot be performed. Sleeve gastrectomy has recently become more and more popular among surgeons because of its relative simplicity and the fact that the continuity of the digestive tract is not altered after surgery. Since simple sleeve gastrectomy does not reduce absorption, the effect of weight loss is lower than that of gastric bypass surgery. Therefore, on the basis of sleeve gastrectomy, we carry out some improved surgical procedures that open up the intestine and reduce absorption, thus avoiding the complications of gastric bypass and achieving a controlled diet and reducing absorption, such as: jejuno-jejunal short circuit, duodeno-jejunal short circuit, etc.