Surgery can be performed with high blood glucose, but only if the criteria for blood glucose control during the perioperative period are met. First, for elective surgery patients, if the current blood glucose level is high, they can be given blood glucose control treatment first. When the blood sugar drops to a stable level and meets the criteria for the surgical period, surgery can be performed. Secondly, for patients with acute surgery, if they need to complete some serious surgery urgently, they can use insulin to control blood glucose during the perioperative period. Finally, for patients with hyperglycemia caused by simple obesity or those with particularly poor dietary control, they can also lower their blood glucose levels through surgical treatment, which has now been adopted as the sixth diabetes treatment option.