In order to investigate the effects of nano-calcium carbonate (NCC) and nano-hydroxyapatite (NHAP) application on the accumulation of cadmium (Cd) in rice, rice potting tests were conducted to analyze the effects of their different application ratios on the rice biomass, the dynamic changes of soil solution pH and Eh, the changes of available Cd in soil, Fe and Mn in the iron plaque on rice root surface, and the concentrations of Cd in various rice tissues as well as Cd bioaccumulation and transport factors. The results showed that NHAP significantly increased rice biomass, while NCC had no significant effect on rice biomass. The three treatments: 0.4%NCC, C+P(5:1) and C+P(10:1), maintained a higher pH value in rice soil drainage phase, which significantly increased by 1.7%, 3.6% and 7.8% compared with the control group. At the same time, compared with the control, the application of nanomaterials, especially the C+P(10:1) treatment, could significantly reduce available Cd in soil by 46.2%. The application of NCC and its composite materials with NHAP enhanced Fe/Mn plaque formation on rice root surface, which contributed to the large amount of Cd adsorption on rice root surface, and reduced the transport of Cd to the aboveground. thus significantly reduced Cd contents in rice, stems, leaves and grains by 22.5%-41.7%.