Laparoscopic gastric cancer surgery is now a relatively mature surgical method and is commonly carried out in tertiary hospitals. The main steps include: establishing a laparoscopic operating platform, laparoscopy to do abdominal exploration, and starting surgical operation if there is no metastatic tumor in the abdominal cavity that can be radically removed. The tissues, large omentum and ligaments around the stomach are firstly dissociated, and the left and right vessels of the stomach, left and right vessels of the gastric omentum are ligated at the root, while the surrounding lymph nodes are removed together, i.e. lymph node dissection. Lymph node dissection is the key step of gastric cancer surgery, and the scope of dissection needs to be cleared to the second station lymph nodes of the stomach. In this way, the stomach is separated from the surrounding tissues, and depending on the location of the tumor in the stomach, there is a majority gastrectomy and a total gastrectomy. A small incision is made in the abdomen after laparoscopic dissection of the stomach tumor, and the stomach is anastomosed with the duodenum or jejunum, and the stomach tumor specimen is examined pathologically to determine the TNM stage of the tumor.