The invention discloses a preparation method of a traditional Chinese medicine compound for treating cough and asthma. The traditional Chinese medicine compound disclosed by the invention comprises the following components: blackberry lily, platycodon grandiflorum, epimedium herb, raw hawthorn and the like. The compound disclosed by the invention has precise treatment effects, has the actions of tonifying qi, nourishing kidneys, clearing lungs, eliminating phlegm and relieving cough and asthma and has good treatment effects on patients suffering from the syndromes such as the cough and asthmaof lung and kidney qi deficiency, phlegm heat and gloomy lungs, acute and chronic bronchitis and bronchial asthma.