Objective To study the effect of Pien Tze Huang (PTH) on tumor proliferation in vitro and chorioallantoic membrane (CAM) angiogenesis. Methods The effect of PTH on the proliferation of cancer cells (SMMC-7721, SGC-7901, and HeLa) were evaluated by MTT assay. The CAM angiogenesis model was established to determine the inhibitive effect of PTH against angiogenesis. Results PTH had significant inhibitive effect on tumor cells proliferation at doses of 0.2—1.0 mg/mL. With the dose of 1.0 mg/mL, the inhibition ratio of PTH was 81.55% on hepatoma carcinoma cell SMMC-7721; PTH significantly affected chick embryonic angiogenesis in doses range of 0.1—1 000 μg/mL and induced a reduction in the capillary plexus of the CAM. The central and secondary capillaries were reduced by 61.1% and 59.1% respectively, at the dose of 10 μg/mL. Conclusion PTH showed significant inhibition effect on tumor proliferation and chorioallantoic membrane angiogenesis in the doses of this study."/>