The invention relates to a traditional Chinese medicine for treating tuberculous peritonitis. The traditional Chinese medicine is prepared from the following medicinal materials in parts by weight: 17 parts of deutzia amurensis, 14 parts of guava leaf, 14 parts of shortstalk monkshood root, 12 parts of Szechwan-Yunnan sanicle herb, 15 parts of euonymus acanthocarpus, 8 parts of pinewood in poria, 12 parts of cupleaf passionflower herb, 24 parts of amur foxtail, 20 parts of vicia multicaulis, 15 parts of michelia champaca, 15 parts of chamaerhodos erecta, 1 part of root or leaf of Pilose Triumfetta 10, 12 parts of rorippa palustris, 12 parts of amaranthus blitum, 14 parts of Chinese ash, 10 parts of rattan, 12 parts of commelina benghalensis and 14 parts of aralia continentalis kitagwa. The clinical experiment proves that the tuberculous peritonitis can be safely and effectively treated by the traditional Chinese medicine.