The invention discloses a drug for reliving cough and asthma, reducing and eliminating phlegm, and treating emphysema bronchitis disease, which consist of 23 Chinese herbal medicines such as Chinese ephedra, almond, gypsum, giant knotweed, earthworm, chrysanthemum, licorice, dyer woad leaves, root of straight ladybell, loquat, lily, ginkgo biloba, platycodon grandiflorum, Sichuan fritillaria, radix stemonae, radix ophiopogonis, pinllia, honeysuckle, batryticated silkworm, radix bupleuri, aster ageratoides, white glabrous greenbrier rhizome, and cassia twig. The drug is prepared through the following steps: drying the raw materials of the drug and grinding the raw materials of the drug into fine powder with 120 meshes, filtering the powder, mixing the powder according to the proportion, performing sterilization to prepare the fine powder into various dosage forms such as powder, watered pill, capsule, block preparation or honeyed pill and the like. The drug has quite good and stable effect on reliving the cough and the asthma, reducing and eliminating the phlegm, and treating the emphysema bronchitis disease and the total effective rate of the treatment is 99.38 percent.