The treatment of gastric cancer is usually divided into four aspects: firstly, surgery, which is the only possible means to cure gastric cancer by removing the tumor and enlarged lymph nodes, but the effect of surgery depends on the stage of gastric cancer, the depth of cancer infiltration and the extent of spread. If the metastasis is distant, palliative surgery is needed to relieve symptoms and maintain nutrition. Secondly, endoscopic treatment, mainly for early gastric cancer, can be performed under endoscopic mucosal resection. The key to success depends on the complete resection of the lesion at the early stage and the absence of lymph node metastasis. Thirdly, chemotherapy is used. Anti-cancer drugs are often used to assist surgery, and chemotherapy is used before, during and after surgery to inhibit the spread of cancer cells and kill the remaining cancer cells, so as to improve the effect of surgery. Fourthly, it is to use intravenous hyperoxia therapy, immunotherapy, and Chinese herbal medicine.