The invention discloses a bra prepared from Chinese herbal medicines and used for preventing breast cancer, relates to medical supplies, and particularly discloses the bra prepared from the Chinese herbal medicines and prepared from 15 g of small centipeda herb, 12 g of cyperus rotundus root, 12 g of red peony root, 12 g of pericarpium citri reticulatae, 30 g of herba corydalis bungeanae, 30 g of angelica sinensis, 20 g of honeysuckle flower, 20 g of fructus forsythiae, 20 g of polygonum cuspidatum and other raw materials. Compared with a conventional general bra, the bra disclosed by the invention can give full play to traditional Chinese medicine traditional efficacies of soothing liver and strengthening spleen, resolving depression and promoting blood circulation, and softening hardness to dissipate stagnation, so as to play a role in prevention of breast cancer. In addition, the invention also provides a preparation method of the bra; the preparation method has the advantages of low cost and simple process, and is suitable for industrial batch production. The bra prepared from the Chinese herbal medicines and used for preventing breast cancer has the function of preventing breast diseases; the preparation method is simple and easy to implement, the cost of treatment is greatly reduced, the patient economic burden is reduced, and the bra has good prospects for development.