The invention relates to a Chinese medicinal preparation used as air
disinfectant, more particularly to a herbal air
disinfectant for controlling avian influenza and a preparation method thereof. The herbal air
disinfectant for controlling avian influenza is prepared from the following materials in weight ratio: 1-10 parts of
Hypericum perforatum, 1-10 parts of
Scutellaria baicalensis, 1-10 parts of
Isatis indigotica root, 1-10 parts of
Lonicera japonica flower, 1-10 parts of
Pogostemon cablin and 1-10 parts of
Eupatorium fortunei. The air disinfectant is produced by the following steps: mixing the above herbal materials, decocting in water for 1-3 times (boiling for 2-3 hours for each time), collecting volatile oils and decoctions, mixing the decoctions, standing overnight, collecting supernatant, filtering, concentrating, precipitating with
ethanol, removing
ethanol, diluting with water, stirring, standing, collecting supernatant, filtering, adding the volatile oils, adjusting the concentration of
drug liquid to 4-10% of the raw materials, stirring and packaging. According to the technical proposal mentioned above, the air disinfectant has no
irritation and
toxicity, can efficiently kill various pathogenic microorganisms, particularly
avian influenza virus, and is used for the prevention and treatment of avian influenza.