The invention aims to provide a traditional Chinese medicine preparation for treating livestock psoriasis remarkable in treatment effect, free from toxic and side effects, free from tolerance and economic, effective and convenient. The preparation comprises the following raw materials in parts by weight: 1-10 parts of eriocarpous glochidion leaf, 1-10 parts of field bindweed, 1-10 parts of ice grass, 1-10 parts of cortex dictamni, 1-10 parts of radix angelicae, 1-10 parts of Lonicera confusa DC, 1-20 parts of cocklebur fruit, 10-20 parts of bark of himalayan coralbean, 10-20 parts of common andrographis Herb, 10-20 parts of wartwort, 10-20 parts of centella asiatica, 10-20 parts of Polygonum aviculare, 20-30 parts of lotus root starch, 20-30 parts of mulberry, 20-30 parts of Polygonum multiflorum, 20-30 parts of Semen sesami nigrum, 20-30 parts of bee pollen, 20-30 parts of cactus, 30-40 parts of tribulusterrestris, 30-40 parts of golden-rod, 30-40 parts of Ferula asafetida, 30-40 parts of calomel, 30-40 parts of lithargite and 30-40 parts of Mosla dianthera.