Abstract: Seven triterpenoids were isolated from the root of Tripterygium wilfordii Hook-f collected in Fu-Jian province. T₁ was identified as wilforlide A; T₂ as wilforlide B; T₃ as 3β, 22a-dihydroxy-Δ¹²-oleanen-29-oic acid; T₄ as 3-epi-katonic acid; T₅ as salaspermic acid; T₆, a new triterpenic acid, as 3,24-dioxo-fridelan-29-oic acid tentatively and T₇ as celastrol.T₇ was shown to inhibit proliferation of lymph cells.