Patients with H. pylori infection can choose the following types of antibiotics for anti-HP treatment, such as levofloxacin, metronidazole, clarithromycin, etc. Levofloxacin belongs to the quinolone class of drugs, which has a strong antibacterial activity for a variety of sensitive bacteria such as H. pylori, Escherichia coli, Shigella spp. but has a relatively poor bactericidal effect on anaerobic bacteria, enterococci, etc.; metronidazole as a nitroimidazole class of drugs. It is commonly used in the treatment of local inflammatory diseases caused by Helicobacter pylori, Streptococcus haemolyticus, Amoeba protozoa and other types of sensitive bacterial infections; clarithromycin as erythromycin derivatives, which have strong inhibitory and killing effects on Gram-negative bacteria, such as Helicobacter pylori, Streptococcus pneumoniae, Haemophilus influenzae, etc. For patients with Helicobacter pylori infection, two or more types of antibiotics will be used. For patients with H. pylori infection, two or more antibiotic drugs are used to enhance the bactericidal effect and reduce the recurrence of the disease.