There is a certain correlation between Helicobacter pylori and gastric cancer, which varies from person to person, and Helicobacter pylori should be eradicated in time to prevent the occurrence of gastric cancer. Helicobacter pylori is currently recognized as a class I carcinogen, which is a common cause of gastric cancer and chronic gastritis and gastric ulcers. However, it does not necessarily mean that infection with Helicobacter pylori will lead to gastritis, gastric ulcers, and gastric cancer, but the specific situation varies from person to person. The occurrence of stomach cancer is caused by a combination of factors, among which the common causes are H. pylori infection, precancerous lesions, etc. It is also closely related to genetic factors, environment and dietary factors. Therefore, the occurrence of gastric cancer is the result of a complex, multi-factors, and is closely but not completely equivalent to H. pylori infection. Those who test positive for H. pylori should undergo prompt eradication treatment. The treatment cycle usually lasts for 10 to 14 days, and the breath test should be rechecked 1 month after stopping the medication to assess the treatment effect. Specific medication should be administered under the guidance of a specialist and should not be used without authorization.