The invention provides a Chinese traditional medicine orally-administrated preparation for treating psoriasis, which is prepared from the following raw materials in percentage by weight: 10 to 15 percent of honeysuckle, 10 to 15 percent of gardenia, 10 to 15 percent of rhizoma coptidis, 10 to 15 percent of radix scutellariae, 10 to 12 percent of radix sophorae flavescentis, 10 to 15 percent of cortex moutan, 10 to 15 percent of radix angelicae, 9 to 12 percent of herba schizonepetae, 10 to 15 percent of burdock-seed, 10 to 12 percent of nux prinsepiae, 10 to 15 percent of cicada shell, 6 to 10 percent of cimicifuga foetida, 6 to 10 percent of mint, 10 to 12 percent of ballonflower, and 6 to 9 percent of liquorice. The compatibility of medicines has the good effects of one clearing and one ventilating and uses the honeysuckle and the rhizoma coptidis as main medicines for clearing away heat and toxic material, and the cimicifuga foetida and the mint are added for ventilating the external exogenous pathogenic factors, thus through one clearing and one ventilating, the Chinese traditional medicine orally-administrated preparation has strict compatibility and treats both principal and secondary aspects of a disease. The Chinese traditional medicine orally-administrated preparation is a pure Chinese traditional medicine preparation, has low cost, can clear away heat and toxic material and eliminate dampness, and disperse pathogenic wind and kill insects; besides, through clinical verification, the effect is quick, subjective symptoms and physical signs are improved obviously, the disease is not easy to relapse, and no toxic side effects are discovered.