The invention discloses a traditional Chinese medicine for treating diabetic foot. According to clinical manifestation and syndrome differentiation, the diabetic foot is classified into two types, i.e., toxic heat collateral blocking diabetic foot and blood stasis collateral blocking diabetic foot. Specific to the toxic heat collateral blocking diabetic foot, an internal formula consists of the following raw materials in certain parts by weight: honeysuckle flower, figwort root, coptis root, baical skullcap root, amur corktree bark, philippine violet herb, red paeony root, tree peony bark, earthworm, unprocessed rehmannia root and dahurian angelica root; and specific to the blood stasis collateral blocking diabetic foot, an internal formula consists of the following raw materials in certain parts by weight: suberect spatholobus stem, bupleurum, astragalus, tuber fleeceflower root, bitter orange, peach kernel, yerbadetajo herba ecliptae, common burreed rhizome, zedoary, safflower, szechuan lovage rhizome, Chinese angelica and twotooth achyranthes root. An external foot bathing formula for treating the two types of diabetic foot consists of coptis root, baikal skullcap root, rhubarb, honeysuckle flower, dandelion, safflower, peach kernel, Chinese angelia root tail, suberect spatholobus stem, Chinese taxillus twig, wild celery, cattail pollen, faeces of flying squirrel, wild ginger, fineleaf schizonepeta herb and garden balsam stem. The traditional Chinese medicine is convenient to use and has a remarkable curative effect.