Differences were studied between wild type and transgenic rice overexpressing barley peroxisomal type ascorbate peroxidase(HvAPX1)under excessive cadmium condition in growth,physiological characters and accumulation of cadmium.The results indicate that with increasing HvAPX1 transcript in transgenic rice,elongation rate of the main root,total biomass, chlorophyll content and activity of the APX(ascorbate peroxidase)all got obviously higher than that of the wild type of rice, respectively.The transgenic plants were significantly more tolerant to cadmium stress as compared with the wide-type plants and accumulate more cadmium.