With the development of lumpectomy technology, laparoscopic-assisted radical gastric cancer surgery is becoming increasingly popular, and although it is considered less invasive than traditional open surgery, it still requires a small 6-8 cm incision for direct visualization to complete the anastomosis. radical surgery. In addition to all the advantages of laparoscopic-assisted radical gastric cancer surgery, all operations are performed laparoscopically, including tumor removal and reconstruction of the digestive tract, and since no additional incision (6-8 cm) is required for anastomosis through laparoscopic anastomosis, the incision can be further reduced, correspondingly reducing trauma and increasing the recovery speed of the patient. The key to the success of this procedure lies in the mastery of the “triangular anastomosis” technique, which is currently performed in only a few medical centers in Japan, Korea, and the United States internationally, and in a few hospitals in China. Delta-shaped anastomosis is a functional end-to-end anastomosis of the posterior wall of the remnant stomach and duodenum performed entirely laparoscopically with a linear cutter closure. During the anastomosis, the staple line of the anastomosis is “V” shaped, and after the common opening is closed with the laparoscopic linear cutter closure, the staple line inside the anastomosis appears triangular in shape, hence the name delta-shaped anastomosis. The large lumen that remains after the anastomosis allows for earlier and more adequate postoperative feeding, and also greatly reduces the occurrence of tipping syndrome. The patient I treated was a 64-year-old female who presented with 20 days of discomfort and distension in the middle and upper abdomen. CT and gastroscopy suggested that a 2.0 cm diameter localized elevated occupying lesion was seen on the lesser curvature side of the gastric sinus, and gastroscopic pathology suggested a mucosal adenocarcinoma in the anterior pyloric region of the gastric sinus. After preoperative discussion in the department, it was decided to perform laparoscopic radical gastric cancer surgery for this patient. After sufficient preoperative preparation, the operation was successfully performed by myself, assisted by Zhou Jin and Wu Yunyun, with Dr. Tao Wenping in charge of anesthesia, and with the full cooperation of operating room nurses Sheng Yamin and Zhu Biyun. The patient recovered well without any complications, and the time of exhaustion, feeding and bedtime were all significantly earlier, and almost overturned the traditional surgical concept of giving a fluid diet after determining the patient’s exhaustion. However, due to the family’s request, the hospital stay was conservative and the patient was discharged successfully on the 8th postoperative day. This procedure has been carried out in several hospitals across the country in 2013. Recently, we tried this technique and concluded that it was satisfactory in terms of operative time consumption, bleeding volume, lymph node dissection, etc., and showed good application prospects. It is believed that with further research, triangular anastomosis will bring new development opportunities for laparoscopic treatment of gastric cancer as long as suitable patients are selected and solid laparoscopic foundation and open experience are possessed, which will also bring gospel to the majority of gastric cancer patients.