Objective To observe the therapeutic effect of Supplemented Simiao Decoction for gouty arthritis and its effect on blood uric acid （UA）. Methods Totally 80 cases of gouty arthritis were randomly and equally divided into two groups. Supplemented Simiao Decoction was used in treatment group

while Allopurinol in control group. The therapeutic effect of both groups was observed after one-week’s treatment

while level of UA and blood fat was observed after two-week’s treatment. Results The markedly and total effective rates of treatment group were 65.0% and 85.0% respectively

which were superior to 42.5% and 72.5% of control group （P<0.01）. UA and blood fat decreased significantly in treatment group as compared with control group （P<0.01 or P<0.05）. Conclusion Supplemented Simiao Decoction is effective for gouty arthritis as relieving symptoms and signs significantly and reducing the level of UA and blood fat.