The present invention relates to a composition for bath additives characterized in that the composition is obtained by a process comprising: subjecting herbal materials to liquid phase fermentation with Bacillus subtilis to obtain a culture, the herbal materials comprising 10% to 25% by weight of Zizania latifolia, 10% to 20% by weight of Artemisia capillaries, 5% to 15% by weight of Houttuynia cordata, 1% to 20% by weight of Saururus chinensis, 1% to 15% by weight of Leonurus sibiricus, 1% to 15% by weight of Angelica gigas, 1% to 15% by weight of Coix lachryma-jobi, 1% to 10% by weight of Plantago asiatica and 1% to 10% by weight of Rhododendron brachycarpum, based on a total dry weight of the herb materials; separating sludge from the resulting culture; and drying, sterilizing and pulverizing the sludge.