The invention provides a traditional Chinese medicine composition for treating pediatric chronic bronchitis and a preparation method thereof. The traditional Chinese medicine composition disclosed by the invention is low in side effects of drugs and good in treatment effect and is suitable for children to use. The traditional Chinese medicine composition for treating pediatric chronic bronchitis, which is disclosed by the invention, is prepared from the following raw materials in weight ratio: 60 g of smilax riparia, 30 g of beautiful millettia root, 30 g of radix fici simplicissimae, 9 g of campylandra chinensis root, 12 g of ginkgo, 9 g of almond, 15 g of sansevieria leaf, 10 g of rhizoma zingiberis, 15 g of thunberg fritillary bulb, 9 g of raw liquorice, 30 g of the tuber of stemona, 30 g of red orange, 30 g of trichosanthes seed, 30 g of semen plantaginis, 30 g of raw peach kernel and 500 g of white sugar. The preparation method of the traditional Chinese medicine composition for treating pediatric chronic bronchitis, which is disclosed by the invention, comprises the following steps: putting all the bulk drugs, except white sugar, into 1500 ml of water, immersing for 60 minutes, decocting by using big fire for 40 minutes, then, decocting by using slow fire for 30 minutes, concentrating decoction into an extract after filtering, drying, grinding, sieving through a 100-mesh sieve, and then, uniformly mixing powder with white sugar.