Objective: To study the preliminary antioxidant activities of ethanolextracts from several Chinese herbal medicine. Method: The in vitro scavenging activities of ethanol extracts by ultrasound on superoxide radical

hydroxyl radical and DPPH·were investigated with vitamin C(VC) as the positive control in this study. Result: The extracts of Glycyrrhiza uralensis

Salvia miltiorrhiza

Pinus massoniana

Angelica sinensis

Podocarpus macrophyllus had scavenging activities on superoxide radical(equivalent of raw material 100 g·L-1

the eliminate rate was 15.86%

11.68%

11.31%

7.88%

5.94%

respectively)

DPPH·(IC50 value was 13.91

1.6

1.87

22.32

3.11 g·L-1

respectively)

·OH(IC50 value was 2.77

1.6

2.1

4.03

2.02 g·L-1

respectively). The VC IC50 value of the three experiments was 0.047

0.93

0.21 g·L-1. Conclusion: Five kinds of ethanol ultrasonic extract from Chinese herbal medicine have antioxidant activity

especially S. miltiorrhiza and P. massoniana

which havs the value of exploiting and utilizing.