To study the antibacterial effect and function of inhibiting delayed type hypersensitivity of Yinma Antiviral Granule.Methods:The multiple proportion dilution method in vitro tube was used to observe the antibacterial effect of Yinma Antiviral Granule. Sensitized experiment of initrofluorobenzene on mice was conducted to observe the function of Yinma Antiviral Granule on delayed type hypersensitivity.Results:Yinma Antiviral Granule in concentration of 0.125 g?mL-1 had antibacterial effect in vitro on staphylococcus bacteria, hemolytic streptococcus, group a streptococcus, pseudomonas aeruginosa and pneumococci; Yinma Antiviral Granule reduced mice mortality effected by pathogenic bacteria; Yinma Antiviral Granule inhibited delayed type hypersensitivity on mice.Conclusion:Yinma Antiviral Granule has internal and external antibacterial effect and it could inhibit delayed type hypersensitivity function.