Gastric tubular adenocarcinoma can be divided into a total of 5 stages. Generally the early and middle stages can live for about 5 years. Gastric adenocarcinoma comes from malignant transformation of gastric glandular cells. The incidence of gastric adenocarcinoma accounts for 95% of gastric malignant tumors, and the rare ones are gastric lymphoma and gastric smooth muscle sarcoma. In early stage, if the tumor is located in the inner layer of gastric mucosa, without reaching the muscular layer of mucosa, without lymph nodes and distant metastatic foci, endoscopic mucosal resection can be performed, and the 5-year survival rate after surgery is close to 100%. If it means that the tumor is located in the mucosa and submucosa, radical surgery is needed, and its 5-year survival rate can reach about 90%. The cure rate of intermediate and advanced gastric cancer is lower, and the 5-year survival rate is about 50%. Stomach cancer needs to seek medical treatment as soon as possible to avoid serious complications.