Under the continuous development of social and economic development, life has also undergone radical changes, especially in the diet is particularly obvious, food culture is constantly enriched, but this has also caused a lot of negative effects. The most obvious is fried food, high calorie, high sugar and other kinds of food on people’s impact, resulting in a lot of people’s obesity problems, now obese people are also increasing, obesity brings more and more serious problems, and obesity makes the chance of type 2 diabetes increased by more than 90%. Obesity, itself a disease, is classified as obesity by the World Health Organization. Not only that, because of obesity, it will also give rise to all kinds of metabolic diseases, such as people often say three high, diabetes, cardiovascular disease, sleep apnea syndrome and so on. The relationship between obesity and type 2 diabetes is almost inseparable. Most diabetic patients eat too much, accumulate fat and are too lazy to exercise, which eventually causes diabetes. For most type 2 diabetes patients, when they go to the hospital, they will be asked by the doctor to control the diet, is to exercise, lose weight as soon as possible, for the treatment of diabetes using internal medicine or insulin injection therapy. In fact, nowadays, medical technology continues to develop and diabetes can be treated by gastric bypass surgery, and many people may not believe this option. However, gastric bypass surgery can help patients lose weight safely and effectively while also treating their diabetes. This technique has been performed in Western countries for many years and has helped countless patients regain their health, not only by reducing body weight, but also by reducing insulin resistance caused by fat accumulation, lowering glucose metabolic load and effectively improving glucose metabolism.