The invention relates to a traditional Chinese medicine composition for treating gout and a preparation method thereof. The Traditional Chinese medicine composition comprises the following material components: coptis chinensis, cortex phellodendri, mung bean, rhizoma smilacis glabrae, lithospermum erythrorhizon, purple perilla, semen coicis, radix paeoniae rubra, reynoutria japonica, taraxacum mongolicum, dioscorea bulbifera, tulipa edulis bak, chaenomeles sinensis, radix cyathulae, ramulus mori, whitmania pigra whitman, rhizoma sinomeni cauliset, dioscorea tokoro, mirabilite and sodium sulfate. The raw materials are matched with one another according to weight, and finally form the traditional Chinese medicine composition with the efficacies of clearing away heat and promoting dieresis, removing heat from the blood, activating the channels, relieving internal fever and removing food retention, and the composition has good curative effect on gout, and ensures that the total effective rate reaches 80 percent. The traditional Chinese medicine composition is scientific in compatibility of medicines, obvious in curative effect, and rapid to take effect, and does not have toxic and sideeffect. The preparation method is simple, practicable, mild in conditions, good in stability and easy to promote.