Abstract: In order to get theory basis for Ginger devolopment, the flavoloid was extracted grandely with organic solvent, and the reduction and the elimination effects as well as the fat anti-oxidation of ginger flavonoid were determined. The results showed that the ginger flavonoid had higher reduction energy more than BHT and PG, the 50% elimination value to ABTS+, DPPH·, ·OH, O2-·were 1.3, 23.2, 40.1, 84.0μg/ml. But it was slightly lower than in the oil peroxide value determination PG, But compared to BHT is remarkable high.

Key words: ginger, flavonoid, reduction energy, anti-oxidant activity