Abstract: The in vitro scavenging capacity of (+) -Catehicn (C) , (-) -Epicatechin (EC) and (-) -Epicatechin-3-O-gallate (ECG) were compared, by monitoring the scavenging rate of DPPH· and ABTS+·, with the Trolox as the reference. The result showed that, for the same sample, the radical scavenging rate increased with its concentration increasing. Trolox reached equilibrium with the shortest time, but its ability of scavenging free radical was below that of ECG. Trolox, C, and EC were in different order in two reactive systems. In general, the free radical scavenging capacity of these three kinds of catechins was in the order of ECG>EC>C.