Infection with Helicobacter pylori does not necessarily lead to stomach cancer. H. pylori infection is closely related to stomach cancer and can lead to stomach cancer, but there is no accurate research data on how long after H. pylori infection cancer will occur. H. pylori infection may cause chronic gastritis and lead to gastric ulcers and gastric atrophy, which may develop into gastric cancer in severe cases, but H. pylori infection does not necessarily lead to gastric cancer. Infection of H. pylori until it develops into gastric cancer is also affected by many other factors, such as genetic factors, dietary habits, living habits, etc. The development of gastric cancer is the result of many factors. However, Helicobacter pylori is one of the clearer cancer-causing factors for gastric cancer, and about 160,000 people die of gastric cancer every year in China. Early detection of H. pylori infection and timely and effective anti-H. pylori treatment are of great significance to the prevention and control of gastric cancer.