Although it is not a cure for diabetes, it can help patients to get rid of drug dependence and achieve long-term and stable sugar control under perfect post-operative management, which greatly improves patients’ quality of life and has economic advantages in the long run. However, compared to traditional drug therapy, weight loss metabolic surgery for diabetes has certain limitations. Its treatment principle is to use weight reduction, diet control and absorption reduction to reduce insulin resistance and directly lower part of blood sugar, and then use the remaining insulin secretion function of the body to complete the regulation of blood sugar, so it can achieve the best results in the treatment of type 2 diabetes caused by obesity, but can play a minimal effect on non-obese type 1 diabetes. Similarly, special types of diabetes, such as gestational diabetes, are not suitable for this treatment. In addition to the restrictions on the type of diabetes, weight loss metabolic surgery has requirements for the patient himself. Patients need to develop good lifestyle habits after weight loss metabolic surgery to ensure the safety and effectiveness of the procedure, so those who are addicted to alcohol, abuse drugs, or are unwilling to cooperate in improving their post-operative lifestyle habits are also not suitable for this method of treatment.