The treatment of obesity is different from other diseases, and it ends after the cure. Obesity is accumulated little by little from daily life, so preventing rebound back after bringing down the weight is also an important part of the treatment of obesity. Gastric reduction diet is an effective method for treating morbid obesity, which can help patients return to a healthy weight in about one year. The main weight loss period for gastric reduction is basically focused on the body’s adaptation phase. In the period just after the surgery, the body has not fully recovered and cannot eat normally, so it can only get nutritional supplements by means of fluids or semi-liquids, and the fat is consumed in large quantities because of the lack of energy, so that it can lose tens of hundreds of pounds within a year. About a year later, the body has adapted to the transformation of the gastrointestinal, diet is no different from the normal people, but the amount of food will be much smaller than before, energy intake is limited, and generally will not regain weight. Therefore, theoretically speaking, the weight loss effect of gastric reduction surgery can be maintained all the time. However, in addition to overeating, excessive consumption of high-calorie food or too little exercise will also lead to excessive energy intake and obesity, and if these bad habits are not changed in time, there will still be a risk of regaining weight after the body has adapted. Therefore, after the weight reduction surgery, patients need to develop healthy living and eating habits under the guidance of health managers and nutritionists.