Helicobacter pylori can cause diseases, but not all helicobacter pylori have the same pathogenicity. For example, there is a gene cluster called dupA in the gene of Helicobacter pylori, which is related to the inflammatory strength of Helicobacter pylori. Helicobacter pylori with complete dupA gene cluster will be more pathogenic, while Helicobacter pylori without complete dupA gene cluster or without this gene cluster will be much milder. Helicobacter pylori infection has become the chief culprit of various gastrointestinal diseases. At present, western medicine treatment takes killing Helicobacter pylori as the main treatment method, with clarithromycin and tinidazole as the main body, combined with proton pump inhibitors, H2 receptor antagonists and bismuth as the fashion. This treatment method is certainly advanced and scientific.