Abstract: Strontium (Sr) is a common fission product of U-235 and Pu-239. Radioactive isotopes are toxic because they are heavy metals and also because of their radioactivity. The fate of radio nuclides in the environment is similar to that of stable elements therefore the behavior of stable Sr-88 in the environment should be regarded as a useful analogue for predicting the long-term fate of Sr-90. Phytoremediation is an emerging alternative technology which utilizes plants to remove metals from the environment. To investigate the ability of oats to accumulate strontium four oat varieties (Bende, Baiyan No.2, Baiyan No.7 and Dingyou No.6) were exposed to five strontium levels (0, 25, 100, 500 and 1000 mg/kg). Plants were cultivated for 30 days. Strontium accumulation and distribution in plants, growth, MDA content, as well as POD, SOD and CAT activity were measured. The results showed that the root and shoot biomass of oat seedlings were increased early and decreased later with increased strontium concentration. Strontium accumulation increased with increased strontium levels; ranked leaf> root>stem. Translocation decreased with increasing strontium concentration. The high strontium treatments increased the MDA content and inhibited POD activity whereas SOD activity increased. The root, stem and leaf of oats could accumulate strontium but most was accumulated in the leaf. All four varieties were able to be classified as hyper accumulators of strontium. Low strontium concentration increased the activities of antioxidant enzymes.Under high strontium concentrations SOD and CAT played an important role in scavenging active oxygen. Oats were able to accumulate and tolerate high concentrations of strontium and could be used for phytoremediation of strontium polluted soils.