Sleeve gastric surgery is usually a laparoscopic gastric sleeve resection. Gastric fistula is usually an anastomotic fistula. Anastomotic fistula after laparoscopic gastric sleeve resection most often occurs within 1 week after surgery and is one of the serious complications in the early postoperative period, but it does not occur in all people. The occurrence of anastomotic fistula is associated with improper suturing, excessive anastomotic tension, insufficient blood supply to the tissues, anemia, hypoproteinemia and tissue edema. Most often occurs within 1 week after surgery, the patient presents with high fever, tachypnea and other symptoms of systemic toxicity, peritonitis, and abdominal drainage tubes draining turbid fluid containing intestinal contents. If it occurs later, a localized abscess or external fistula is formed. Gastric fistula has a certain incidence, therefore, sleeve gastric surgery operation should be in strict accordance with the requirements, careful operation, postoperative observation, minimize the incidence of gastric fistula. Once the occurrence of gastric fistula is found, it should be treated promptly. Patients who have anastomotic fistula phenomenon or other uncomfortable symptoms after the operation should contact the doctor in time and be handled by the doctor.