The compounds, which extracted from Equisetum arvense, Crataegus pinnatifida Bunge, Rosa maximowicziana Regel and Physalis alkekengi, were selected to determine the content of flavonoids and polysaccharides by a visible light spectrophotometry, and the antioxidant activity was determined by a chemical method. The results showed that the content of flavonoids in our compounds was 0.204 mg/g and the polysaccharides was 2.498 mg/g. In scavenging experiments, the levels of hydroxyl radicals and superoxide anion were lower compared with negative control, but the levels were still higher than positive control. The ability to scavenge superoxide anion was more powerful than hydroxyl radicals. This determined that our compound preparation extract have the ability to scavenge hydroxyl radicals and superoxide anion.