Focusing on medication frequency and dosages, medication situation of 177 cases of vulgaris psoriasis patients treated by Professor Duan Xingwu from October to November of 2015 are summarized in this paper, and then 16 drugs of higher frequency use are screened and analyzed. Thus it provides the reference for the clinical treatment of vulgaris psoriasis, and investigates Professor Duan’s thought of“disease differentiation”