A pot experiment was conducted to study the effects of three amendments(red mud, lime and sepiolite)on remediation of Cd in Cd-contaminated paddy soil and photosynthetic characteristics of rice plant. The results indicated that application of red mud, lime and sepiolite could effectively promote the stabilization of soil exchangeable Cd and the immobilization of Cd with the red mud shown the best immobilization effect. Compared with the control, the application of red mud increased yield dramatically, by 11.41%, and the application of sepiolite slightly increased the yield, while the application of lime decreased the yield slightly. The application of soil amendments could improve chlorophyll content (SPAD value), the rice stomatal conductance(Gs), the net photosynthetic rate(Pn), intercellular CO2 concentration(Ci)and transpiration rate(Tr)of flag leaf of rice. Among the three amendments, the effect of application of red mud was most obvious, with which the SPAD value, Gs, Pn, Ci and Tr was respectively increased by 6.63%, 8.59%, 6.93%, 11.95% and 5.42%. Three amendments all increased the flag leaf area, but the degree of increase varied. Compared with lime and sepiolite, red mud application could better alleviate the effect of Cd on rice growth. .