Abstract: The biosorption of Cd²⁺ by suspended saccharomycete was investigated with various influencing factors on the process discussed. The results showed that 10 minutes after starting the process, the adsorption equilibrium comes about. The pH value has a great effect on the biosorption, and when it is 5.41, the biosobent shows a best adsorbing effect. The initial mass concentration of adsorbate is also an important influencing fact on the biosorption, and the adsorbing rate can be up to 99% if the concentration of adsorbate is 228.4 mg/L and that of adsorbent is 14 g/L. The results of IR spectrum showed that the adsorbing positions of the suspended saccharomycete biomass to Cd²⁺ are mainly the -OH, C=O, P=O, -NH2, and S=O.