A pharmaceutical composition for treating bronchitis and preparation method thereof. Said pharmaceutical composition consists of EPHEDRAE HERBA, GYPSUM FIBROSUM, FORSYTHIAE FRUCTUS, SCUTELLARIAE RADIX, MORI CORTEX, ARMENIACAE SEMEN AMARUM, PEUCEDANI RADIX, PINELLIAE RHIZOMA, etc. Said pharmaceutical composition is useful in relieving cough, eliminating phlegm, relieving asthma and resisting inflammation, so it has good curative effects on the acute tracheobronchitis.