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, and the concentrations of Cd in various rice tissues as well as the bioaccumulation and transport factor. The results showed that NHAP significantly increased the rice biomass, while nano-calcium carbonate had no significant effect on rice biomass. The three treatment groups: 0.4% NCC, C+P (5:1) and C+P (10:1), maintained a higher pH value in the rice soil drainage phase, which significantly increased by 1.7%, 3.6% and 7.8% compared with the control group. Except for the nano-hydroxyapatite treatment group, the nanomaterials application enhanced Fe/Mn plaque formation on the root surface, which contributed to the large amount of cadmium adsorption on the root surface, and reduced the transport coefficient of cadmium to the aboveground. At the same time, compared with the control, the application of nanomaterials, especially the C+P (10:1) treatment, could significantly reduce the available Cd of the soil by 46.2%, which led to the enrichment of cadmium in the roots and the reduction of cadmium transport to the ground, thus significantly reducing the cadmium content in the roots, stems, and leaves as well as grains by 22.5-41.7%.