This invention provides a Tibetan medicinal composition for expectorant, antitussive, antiasthmatic and its preparation method. It is prepared by using the following medical ingredients in accordance to the amount by weight: gentian flower 90-135, savoury rhododendron leaf 445-665, licorice root 45-65, Japanese bulbocapnine 90-135, trendrilleaf fritillary bulb 55-75, larberry root 450-660, plumieride,45-65, crab shell 45-65, racemose inula root, 70-110, horse ladder, 2.0-2.0. It is proved by tests that the composition of this invention can be used for treating cough, sound breathe, yellow sputum due to accumulation of phlegm and heat in the lung, or running nose, sourer throat, thirst, reddish urine, dry stool due to heat, and acute tracheitis, acute attack of bronchitis and those of the above symptom groupings. The medicine is of short toxin, safe for oral taking. It can be provided to the clinical use, it has high biological use with excellent curative effect.