Objective:To observe the effect of He-Ne laser combined with ammonium glycyrrhetate in the treatmnet of 62 patients.　Methods:62 cases of patients with psoriasis vulgar were divided into two groups. 36 cases (A group) received He-Ne laser combined with ammonium glycyrrhetate intravenous infusion, 26 cases(B group) received only ammonium glycyrrhetate. The therapy course of both groups were 30 days.　Results:The total effective rate of two groups was 82.2%. The effective rate of A group and B group were 88.9% and 73.1%, respectively. There was siginfinant difference by the analysis(ridit test)between two groups(U＝2.76，P＜0.01).　Conclusion:The effect of He-Ne laser combined with ammonium glycyrrhetate in the treatment of patients with psoriasis vulglar than that of ammonium glycyrrhetatealone.