In China, the incidence rate of stomach cancer is increasing with age, with the peak incidence at 50-80 years old. Usually, the five-year survival rate of middle and late gastric cancer is only 20%, while the five-year survival rate of early gastric cancer can reach more than 90%. It is necessary to pay attention to the following matters: 1. When gastrointestinal symptoms appear, such as abdominal pain, bloating, acid reflux, hiccup, belching, etc., seek medical treatment as early as possible for gastroscopy, and feasible abdominal CT, checking the tumor markers and checking whether there is any problem in the stomach; 2. Pay attention to the light diet in normal times, and avoid eating stimulating alcohol and spicy food, so as to reduce stimulation to the gastric mucous membrane, esophagus, intestines; 3. Once gastrointestinal discomforts appear, such as abdominal pain, bloating, nausea, vomiting, etc., it is necessary to pay attention to the following things 3, once the digestive discomfort symptoms, such as abdominal pain, abdominal distension, nausea, vomiting, acid reflux, heartburn, as soon as possible for gastroscopy to check whether the gastric mucosa of congestion, edema, erosion, color changes. If found, biopsy can be taken to test whether there is atypical hyperplasia or intestinal epithelial hyperplasia; 4. Detect Helicobacter pylori, whether there is Helicobacter pylori infection or not, and take medication to remove inflammation in time at an early stage, so that the risk factors can be strangled in the cradle as far as possible. Early gastric cancer is often resected through gastric mucosal dissection to achieve the goal of radical treatment, which can avoid early gastric cancer from developing into middle or late gastric cancer.