This study investigated the effects of four amendments，oyster shell (OS)，potash feldspar (PF)，dolomite (DM)，and organic source (OM) amendments，on the adsorption of Cd by small rape in Cdcontaminated soil，and the speciation of Cd in soil was measured，which aimed to provide foundation for the amendment of Cdcontaminated soil.The results showed that compared to the control，as the addition of OS，PF and DM was 1%，the pH of the soil respectively increased from 4.1 to 7.5，7.1 and 7.1，CEC increased by 55.9%，26.3% and 15.0%.And the amount of exchangeable cadmium (ExchCd) decreased by 81.1%，65.1% and 63.6%，while EDTACd increased by 121.6%，132.0% and 106.3%.In addition，OS，PF and DM amendment significantly improved the tolerance index of small rape on Cd，and the amount of Cd in small rape respectively decreased by 83.9%,78.9% and 82.3%，while biomass increased by 990%，690% and 800%.Above all，OS，DM and PF reduced the availability of Cd and absorption of Cd in small rape，and the best one was OS.