The removal of Cd(II) from aqueous solution by chitosan(CTS) were investigated. In this research, the CTS were used as flocculant and adsorbent, respectively. First, the IR spectra analyzed the structure of CTS. Then the effect of flocculation conditions such as dosage of the CTS, the pH value, the stirring time at the second stage and the settling time in the coagulation test were investigated in details. When the Cd(II) initial concentration in aqueous solution was 3.0mg/L, the maximum removal rate could reach 99.7% when the pH value was 7.0 and the dosage was 4.0mg/L. Then the adsorption test using CTS also researched, including CTS dosage as adsorbent, initial concentration of Cd(II), oscillation time and the pH value were investigated in the adsorption test.