Psoriasis is one of the common skin diseases in clinic, which is difficult to recover and easy to recur,which seriously affects the physical and mental health of patients. Professor LIU Qiao in more than 30 years of clinical work, the treatment of psoriasis experience, summed up the cause of psoriasis mainly by a variety of toxic evil invading the human body, toxic evil accumulation of skin striae, rising and falling of vital qi and pathogen, qi-blood coagulating and intermingling, channel block,corruption of zang-fu organs. On the treatment advocate classification demonstration, white crust with pattern of internal amassment of blood heat to clear heat and detoxify cool blood as the method, choose Xijiao Dihuang decoction; syndrome of wind and dryness due to blood deficiency treatment to nourish blood and nourish yin, wind and moisten dryness, choose Dangguiyinzi; syndrome of qi stagnation and blood stasis to activating blood and resolving stasis, choose Taohong Siwu decoction. In addition to treatment based on syndrome differentiation, clinical attention is also paid to detoxification and conditioning emotions, forming a complete and effective theoretical system.