Billroth2 type gastrectomy, that is, partial gastrectomy gastrojejunostomy, its surgical steps are as follows: 1. Patients who meet the indications for surgery need to make good preoperative preparations, including improving general nutrition and supplementing blood volume. 2. General anesthesia is generally used. After anesthesia, the patient takes a lying position, and an incision is made in the midline of the upper abdomen. 3. Free the stomach and duodenum. 4. Cut off the duodenum and suture the stump. 5. Cutting off the left gastric artery and gastrectomy. 6. Anastomosis of the post-colonic stomach to the jejunum. 7. Anastomosis of pre-colonic stomach to jejunum. The advantage of billroth2 type gastrectomy is that even if the gastric resection is more, the gastrojejunal anastomosis will not cause excessive tension, and the recurrence rate of postoperative ulcer is low. However, since the surgery changes the normal anatomical and physiological relationship, there are relatively more postoperative complications, including gastric hemorrhage, anastomotic ulcers, and reflux gastritis. Postoperative care and medication should be taken as prescribed to minimize the possibility of complications. It should be noted that peptic ulcer perforation for more than 12 hours and severe abdominal infection are prohibited to perform this surgery.