Total laparoscopic distal gastrectomy consists of two main parts: resection of the lesion and reconstruction of the digestive tract. Distal gastrectomy is a surgical major gastrectomy, during which 2/3 to 3/4 of the distal stomach and part of the duodenal bulb are removed and the digestive tract is reconstructed. The procedure is now widely performed laparoscopically. 1. Resection of the lesion: It is currently believed that gastric resection of 2/3~3/4 is more appropriate, if duodenal ulcer and preoperative high gastric acid secretion can increase the scope of resection, and vice versa is not necessary. The larger the scope of gastric resection, the better the effect of reducing gastric acid, but too large a scope of resection will make the postoperative gastric volume is too small, which is not conducive to the patient’s nutrition. 2. Gastrointestinal reconstruction: it mainly includes three types of surgery: Billroth I anastomosis, Billroth II anastomosis and gastrojejunum Roux~en~Y anastomosis, each of which has its own merits and demerits, and needs to be selected according to the patient’s condition.