Morbid obesity refers to the kind of more serious obesity, generally BMI reaches 30 or more or has appeared obesity associated with the disease can be seen as morbid obesity. Different from mild obesity, morbid obesity due to excessive weight, patients are generally difficult to lose weight successfully through conventional methods, and most patients will regain weight after using conventional methods to lose weight, it is difficult to maintain the weight loss effect for a long time. In addition to the difficulty of weight loss, morbidly obese people also have more limitations in weight loss methods than mildly obese people. Light obese people because the situation is light, as long as the method of science and can adhere to, exercise, dieting and so on can achieve the ideal weight loss effect, but heavy obese people not only appetite is larger, difficult to restrain, too high weight also makes exercise weight loss is no longer suitable for them, not to mention that some people will have cardiorespiratory insufficiency problem exists. For the morbidly obese, weight loss surgery is the most effective way to lose weight in the long term. Weight loss surgery is a weight loss method specifically for the severely obese, and has been developed at home and abroad, with about 500,000 people worldwide losing weight through this surgery each year. Weight loss surgery can reduce 60% to 80% of excess weight, that is to say, the more serious obesity to lose more weight, and the weight loss period is generally about a year, and the efficiency is also very high. At the same time, after the weight loss surgery, as long as the life and diet habits are normal, almost will not regain weight, which is also the traditional weight loss methods can not do. Now, the obese population in China is getting bigger and bigger, and the number of morbidly obese people is increasing, so weight loss surgery will gradually show its importance and make an important contribution to solving the obesity problem.