The invention discloses a Chinese medicine for oral administration to treat acne, which comprises the following components: root of rehmannia, scrophularia, radix paeoniae alba, morning glory seed, gypsum, rhizoma anemarrhenae, radix sileris, prepared mustard, cogongrass rhizome, Baikal skullcap root, fructus tribuli, batryticated silkworm, radix curcumae, radix salviae miltiorrhizae, full snakegourd fruit, pollen, tuckahoe, chrysanthemum, dandelion, burreed rhizoma, Rhizoma Zedoariae, forsythia, cortex moutan, gardenia, herba violae, Pinellia tuberifera, radix linderae, radix asparagi, dwarf lilyturf root, balloon-flower, root of straight ladybell, red paeonia, and Angelica dahurica. The invention further discloses the decocting method for the orally administered Chinese medicine. As proved by clinic medical practices, the Chinese medicine taken orally has the advantages of special curative effect in the treatment of acne, and resistance to relapse after healing.