Solution culture is conducted to investigate the effects of iron oxides and root exudates on cadmium uptake by rice. The results showed that iron oxides may absorb cadmium from nutrient solution. The amount of Cd accumulated on rice root surface increased with the increase in amount of deposited iron oxides. Therefore, iron plaque can influence the Cd uptake. When Fe nutritional status of rice are different, the effect of iron oxides on Cd uptake by the rice roots is also different. Generally, with the increase of Cd concentration in medium, the amount of Cd deposited on root surface and Cd content in rice shoot increased. Rice root exudates (PS) may mobilize Cd accumulated by iron oxides on the surface of rice root and significantly enhance Cd uptake in the rhizosphere. When Cd concentration in nutrient solution was different, the effect of PS on Cd uptake was also different.