Objective: to discuss the clinical effect on psoriasis with blood stasis type treated by Huoxue Heyin decoction.Method: 64cases were randomly divided into 32 cases each in treatment group and control group.Cases in the control group were treated by Xiaoyin tablets and cases in the treatment group treated by Huoxue Heyin decoction.Results: The recovery rate was 25.0% in the treatment group and 9.4% in the control group(P0.05).PASI integral after treatment in the treatment group was superior to that in the control group(P0.05).Conclusion:(P0.05).Conclusion: Huoxue Heyin decoction had better effect for treating psoriasis with blood stasis type.