Objective: To study the antioxidant activity of different extracts from Rourea microphylla in Guangxi. Method: EE (95%ethanol)

AE(acetone)and EAE (ethyl acetate) extracts were obtained by cold-extraction. The antioxidant activities were studied using DPPH(1

1-diphenyl-2-picrylhydrazyl radical 2

2-Dipheny l-1-(2

4

6-trinitrophenyl) hydrazyl)assay

2

2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS+) assay and reducing power assay by UV-VIS (Ultraviolet and visible spectrophotometry) spectrophotometry. Result: The EE of R. microphylla exhibited the most outstanding antioxidant activities. The IC50 values of EE in DPPH assay and ABTS+ assay were 0.66

0.60 g·L-1

respectively. The reducing power of all extracts was in the sequence of EE>EAE>AE

which was in accordance with the total flavonoid(TF)content. Conclusion: All the extracts especially EE extract of R. microphylla could be employed as natural antioxidants and health care products.