Gastric cancer is one of the common clinical malignant tumors of the digestive tract. According to the announcement of World Health Organization, the global annual incidence rate of gastric cancer is 13.86 per 100,000 people. China is a region with high incidence of gastric cancer, and the annual incidence and mortality rate of gastric cancer are more than two times of the world average. More than 90% of patients with early stage gastric cancer can survive for more than 5 years or be cured after adequate treatment, while less than 5% of patients with advanced gastric cancer can survive for 5 years after treatment. Therefore, early prevention, early detection and early diagnosis are the keys to reduce the incidence and mortality rate of gastric cancer. Factors that can trigger gastric cancer include: 1, poor dietary habits: such as irregular diet, fast eating, high salt/hot food, pickled, smoked, dried seafood, overnight food with high content of carcinogenic nitrite, red meat with barbecue, frequent consumption of moldy food, less fresh vegetables, etc. 2.Long-term alcoholism and smoking: alcohol can change the mucous membrane cells and cause cancer. Smoking is also a risk factor of gastric cancer, and those who start smoking in adolescence have the greatest risk. 3.Family history of gastric cancer or esophageal cancer: the incidence of gastric cancer among patients’ family members is 2-3 times higher than normal population. 4.Long-term poor psychological status: such as depression, sadness, loneliness, depression, hatred, disgust, low self-esteem, self-blame, guilt, interpersonal tension, sulking, etc., the risk of stomach cancer is significantly higher. 5.Some special occupations: long-term exposure to sulfuric acid dust and mist, lead, asbestos, herbicides and metal industry workers have significantly higher risk of gastric cancer. 6. Helicobacter pylori (Hp) infection: According to some studies, about half of gastric cancers are related to H. pylori infection. About 60% of the country’s population is infected with the bacteria, but only 0.03% of the population suffers from stomach cancer. As long as people pay attention to the four seasons of climate change, live in a disciplined way, have a good living environment, combine work and rest, eat reasonably, do not smoke, do not drink, maintain the balance of the body’s internal environment, and improve their own resistance to disease, they can effectively prevent the occurrence of gastric cancer.