The invention discloses a traditional Chinese medicine composition for treating psoriasis vulgaris. The traditional Chinese medicine composition is prepared from various medicinal raw materials which comprise angelica, radix paeoniae alba, ligusticum wallichii, radix rehmanniae, tribulus terrestris, radix sileris, schizonepeta spike, fleece-flower root, liquorice, poria cocos, day lily, fortune microsorium herb with root, bighead atractylodes rhizome, cortex dictamni, scorpion, viola yedoensis, zaocys dhumnade, oldenlandia diffusa, radix scrophulariae, cicada slough, rhizoma sparganii, rhizoma zedoariae, centipede, herba lycopi, belvedere fruit, radix clematidis and platycladi seed. The traditional Chinese medicine composition has the effects of dispelling the wind, clearing heat, nourishing blood and yin and moistening skin and is mainly used for treating symptoms such as patchy rash, light red color, reduction of scales and conscientious itching occurring on skin, which are accompanied with oropharynx dryness and are caused by constitutional vacuity, insufficiency of vital energy and blood, wind generation and transformation into dryness. A preparation technology of the traditional Chinese medicine composition is simple and convenient; the traditional Chinese medicine composition is a new medicine which has low toxic and side effects, is convenient to administrate, easy to prepare and low in cost; the medicinal raw materials with different medicine properties are scientifically combined, so that the ideal treatment effect can be achieved; the traditional Chinese medicine composition is safe and simple to prepare, has low toxic and side effects and can directly reach the focuses; the psoriasis vulgaris is difficult to relapse after being healed by the traditional Chinese medicine composition.