The invention relates to a scouring bath additive derived from plant, in particular to a traditional Chinese medicine additive which is used for bath lotion and has the efficacy of antibacterium and bacteriostasis. The traditional Chinese medicine additive comprises the raw materials based on the weight ratio: 10-15% of lightyellow sophora root, 15-25% of goldthread root, 15-20% of artemisia leaf, 20-30% of ginger, 15-20% of peppermint, 20-30% of baikal skullcap root, 10-15% of chili, 15-20% of cacumen platycladi, 15-20% of phellodendron, 25-30% of smallanthus sonchifolius leaves and 25-35% of liquorice. The additive can be used for the bath lotion including shampoo, bath milk, facial cleanser and liquid soap, and can replace chemical bacteriostatic agent for killing and inhibiting conventional bacteria such as excrement colon bacillus, staphylococcus aureus, pseudomonas aeruginosa and the like as well as dermatophyte such as malassezia. After being added into the bath lotion, the bath lotion has the functions of relieving itching, sterilizing, removing scurf and protecting the skin, causes no stimulation and toxic side effect for the skin, and has the advantages of low cost and no environmental pollution.