Abstract: AIM　To study the protective effect of Gn-3 (a stilbene polymer isolated from Gnetum parvifolium) against liver injury induced by CCl₄, N-acetyl-p-aminophenol (APAP) and Bacillus Calmette-Guerin (BCG) plus bacterial lipopolysaccharide (LPS) in mice. METHODS　The experimental model of liver injury were induced by 0.1% CCl₄ ip (10 mL*kg^-1*d^-1 for 3d), APAP ip (150 mg*kg^-1) or BCG (5 mg) plus LPS (7.5 μg) in mice. The levels of ALT in serum, MDA and GSH in liver tissues were detected. The histopathologic changes were observed by light microscope. RESULTS　Gn-3 was shown to markedly reduce the elevated serum ALT levels, liver tissue MDA and improve the histopathological changes in all the three experimental liver injury models. No effect of Gn-3 was observed on the liver GSH level in liver injury mice. CONCLUSION　Gn-3 was found to inhibit the development of liver injury caused by CCl₄, APAP, or BCG plus LPS. This means that Gn-3 has liver protective effects.