Objective To observe the therapeutic effects of integrated traditional Chinese and western medicine therapy on psoriasis vulgaris.Methods 75 patients with psoriasis vulgaris were randomly divided into two groups.45 patients in treatment group were given one dose of kangyin lotion dipping every other day,meanwhile given Acitretin capsules 10 mg each time,2 times a day.And other 30 cases in control group were given Acitretin capsules 10 mg each time,2 times a day.The therapeutic courses were 12 weeks in both groups.Then the therapeutic effects of two groups were observed.Results The total effective rate in treatment group(93.3%) was significant higher than that in control group(76.7%,P0.05).The PASI scores after treatment were decreased as compared with those before treatment in two groups(P0.01).The decrease of PASI score in treatment group was significant(P0.05).Conclusion Kangyin lotion combined with Acitretin capsules has good effect on psoriasis vulgaris.