Laparoscopic-assisted radical gastric cancer surgery is usually used for relatively early gastric cancer, where the tumor is relatively confined and does not break through the plasma layer of the tumor, and there are not many surrounding lymph nodes metastases or distant metastases. Three to four small holes are made in the abdomen, and the laparoscopic instruments are used to enter the abdominal cavity, project the abdominal cavity onto the screen under the display of intra-abdominal lens, disconnect and ligate the perigastric vessels with laparoscopic instruments, remove the tumor, and then anastomose the resected stomach with the duodenum or jejunum through the laparoscopic instruments, and then remove the resected gastric cancer specimen through the abdominal incision.