Abstract: The SOD、CAT activities and MDA content in Anadara subcrenata have been studied respectively after being exposured with phenanthrene(Phe) and cadmium(Cd) separately and jointly for 9 days and then recovered in clean water by static infected experiment.Under the infected experiment conditions,the results showed that SOD and CAT activity of Anadara subcrenata followed an induced trend,and MDA content were lower than the control group.The effects of high concentration groups (Phe 50g/L,Cd 500g/L) were more obvious than the low concentration groups (Phe 10g/L,Cd 100g/L).Furthermore,the oxidative pressure of Phe on Anadara subcrenata was greater than the effect of Cd,and the joint effect of Phe and Cd was higher than the single role.The oxidative pressure can recover gradually when removed the exposure of Phe and Cd.Especially,SOD and CAT activity with 100g/L Cd exposure returned to the control level when transferred to the clean water.It was indicated that Anadara subcrenata has better ability to resist oxidative stress and self-recover.