The invention relates to a traditional Chinese medicine for treating asthma. The traditional Chinese medicine is composed of the following raw materials in parts by weight: 48 to 55 parts of ladybell root, 27 to 35 parts of polygonatum rhizome, 28 to 32 parts of perilla seed, 30 to 35 parts of red peony root, 8 to 10 parts of semen oroxyli, 10 to 15 parts of earthworm, 12 to 18 parts of rhizoma arisaematis, 14 to 18 parts of semen lepidii, 28 to 35 parts of radix scutellariae, 12 to 18 parts of rhizoma typhonii, and 5 to 9 parts of agilawood. The provided traditional Chinese medicine has the advantages of low cost and no side effect, the synergetic effect among traditional Chinese herbals improves the curative effect, furthermore, the side effects of traditional Chinese herbals are reduced or even eliminated, asthma can be cured radically, during the preparation process, the synergetic effect is further enhanced, the curative effect is further strengthened, the toxicity and side effect of traditional Chinese herbals are eliminated, and the curative effect of the traditional Chinese medicine is improved.